Home / 31,037.27-42,781.64-20,962.49

Finding the Fourth Proportional to 31,037.27, 42,781.64 and 20,962.49

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Solution

The fourth proportional to 31,037.27, 42,781.64 and 20,962.49 is: 28,894.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,037.27 : 42,781.64 = 20,962.49 : x
  2. Step 2: Convert to fraction form
    31,037.27/42,781.64 = 20,962.49/x
  3. Step 3: Cross multiply
    31,037.27x = 42,781.64 × 20,962.49
  4. Step 4: Simplify right side
    31,037.27x = 896,809,381.96
  5. Step 5: Solve for x
    x = 896,809,381.96/31,037.27
  6. Step 6: Final answer
    x = 28,894.60

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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.