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Finding the Fourth Proportional to 12,885.60, 19,348.20 and 7,053.60

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Solution

The fourth proportional to 12,885.60, 19,348.20 and 7,053.60 is: 10,591.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,885.60 : 19,348.20 = 7,053.60 : x
  2. Step 2: Convert to fraction form
    12,885.60/19,348.20 = 7,053.60/x
  3. Step 3: Cross multiply
    12,885.60x = 19,348.20 × 7,053.60
  4. Step 4: Simplify right side
    12,885.60x = 136,474,463.52
  5. Step 5: Solve for x
    x = 136,474,463.52/12,885.60
  6. Step 6: Final answer
    x = 10,591.24

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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.