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Finding the Fourth Proportional to 28,403.74, 42,624.57 and 9,935.74

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Solution

The fourth proportional to 28,403.74, 42,624.57 and 9,935.74 is: 14,910.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,403.74 : 42,624.57 = 9,935.74 : x
  2. Step 2: Convert to fraction form
    28,403.74/42,624.57 = 9,935.74/x
  3. Step 3: Cross multiply
    28,403.74x = 42,624.57 × 9,935.74
  4. Step 4: Simplify right side
    28,403.74x = 423,506,645.13
  5. Step 5: Solve for x
    x = 423,506,645.13/28,403.74
  6. Step 6: Final answer
    x = 14,910.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.