Home / 30,987.27-42,762.69-16,840.11

Finding the Fourth Proportional to 30,987.27, 42,762.69 and 16,840.11

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Solution

The fourth proportional to 30,987.27, 42,762.69 and 16,840.11 is: 23,239.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,987.27 : 42,762.69 = 16,840.11 : x
  2. Step 2: Convert to fraction form
    30,987.27/42,762.69 = 16,840.11/x
  3. Step 3: Cross multiply
    30,987.27x = 42,762.69 × 16,840.11
  4. Step 4: Simplify right side
    30,987.27x = 720,128,403.50
  5. Step 5: Solve for x
    x = 720,128,403.50/30,987.27
  6. Step 6: Final answer
    x = 23,239.49

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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.