Home / 30,991.08-42,762.10-18,243.24

Finding the Fourth Proportional to 30,991.08, 42,762.10 and 18,243.24

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Solution

The fourth proportional to 30,991.08, 42,762.10 and 18,243.24 is: 25,172.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,991.08 : 42,762.10 = 18,243.24 : x
  2. Step 2: Convert to fraction form
    30,991.08/42,762.10 = 18,243.24/x
  3. Step 3: Cross multiply
    30,991.08x = 42,762.10 × 18,243.24
  4. Step 4: Simplify right side
    30,991.08x = 780,119,253.20
  5. Step 5: Solve for x
    x = 780,119,253.20/30,991.08
  6. Step 6: Final answer
    x = 25,172.38

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Half scale
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Double scale
Find fourth proportional to 30,992.08, 42,763.48 and 18,244.24
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.