Home / 30,967.23-42,752.48-20,387.62

Finding the Fourth Proportional to 30,967.23, 42,752.48 and 20,387.62

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Solution

The fourth proportional to 30,967.23, 42,752.48 and 20,387.62 is: 28,146.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,967.23 : 42,752.48 = 20,387.62 : x
  2. Step 2: Convert to fraction form
    30,967.23/42,752.48 = 20,387.62/x
  3. Step 3: Cross multiply
    30,967.23x = 42,752.48 × 20,387.62
  4. Step 4: Simplify right side
    30,967.23x = 871,621,316.30
  5. Step 5: Solve for x
    x = 871,621,316.30/30,967.23
  6. Step 6: Final answer
    x = 28,146.57

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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.