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Finding the Fourth Proportional to 12,719.52, 17,552.55 and 7,130.52

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Solution

The fourth proportional to 12,719.52, 17,552.55 and 7,130.52 is: 9,839.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,719.52 : 17,552.55 = 7,130.52 : x
  2. Step 2: Convert to fraction form
    12,719.52/17,552.55 = 7,130.52/x
  3. Step 3: Cross multiply
    12,719.52x = 17,552.55 × 7,130.52
  4. Step 4: Simplify right side
    12,719.52x = 125,158,808.83
  5. Step 5: Solve for x
    x = 125,158,808.83/12,719.52
  6. Step 6: Final answer
    x = 9,839.90

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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.