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Finding the Fourth Proportional to 28,399.24, 42,617.82 and 9,931.24

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Solution

The fourth proportional to 28,399.24, 42,617.82 and 9,931.24 is: 14,903.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,399.24 : 42,617.82 = 9,931.24 : x
  2. Step 2: Convert to fraction form
    28,399.24/42,617.82 = 9,931.24/x
  3. Step 3: Cross multiply
    28,399.24x = 42,617.82 × 9,931.24
  4. Step 4: Simplify right side
    28,399.24x = 423,247,798.70
  5. Step 5: Solve for x
    x = 423,247,798.70/28,399.24
  6. Step 6: Final answer
    x = 14,903.49

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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.