Home / 30,966.40-42,737.28-18,391.16

Finding the Fourth Proportional to 30,966.40, 42,737.28 and 18,391.16

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Solution

The fourth proportional to 30,966.40, 42,737.28 and 18,391.16 is: 25,381.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,966.40 : 42,737.28 = 18,391.16 : x
  2. Step 2: Convert to fraction form
    30,966.40/42,737.28 = 18,391.16/x
  3. Step 3: Cross multiply
    30,966.40x = 42,737.28 × 18,391.16
  4. Step 4: Simplify right side
    30,966.40x = 785,988,154.44
  5. Step 5: Solve for x
    x = 785,988,154.44/30,966.40
  6. Step 6: Final answer
    x = 25,381.97

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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.