Home / 30,966.93-42,752.04-20,387.31

Finding the Fourth Proportional to 30,966.93, 42,752.04 and 20,387.31

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Solution

The fourth proportional to 30,966.93, 42,752.04 and 20,387.31 is: 28,146.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,966.93 : 42,752.04 = 20,387.31 : x
  2. Step 2: Convert to fraction form
    30,966.93/42,752.04 = 20,387.31/x
  3. Step 3: Cross multiply
    30,966.93x = 42,752.04 × 20,387.31
  4. Step 4: Simplify right side
    30,966.93x = 871,599,092.61
  5. Step 5: Solve for x
    x = 871,599,092.61/30,966.93
  6. Step 6: Final answer
    x = 28,146.13

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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.