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Finding the Fourth Proportional to 19,247.60, 28,849.80 and 10,931.60

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Solution

The fourth proportional to 19,247.60, 28,849.80 and 10,931.60 is: 16,385.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,247.60 : 28,849.80 = 10,931.60 : x
  2. Step 2: Convert to fraction form
    19,247.60/28,849.80 = 10,931.60/x
  3. Step 3: Cross multiply
    19,247.60x = 28,849.80 × 10,931.60
  4. Step 4: Simplify right side
    19,247.60x = 315,374,473.68
  5. Step 5: Solve for x
    x = 315,374,473.68/19,247.60
  6. Step 6: Final answer
    x = 16,385.13

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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.