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Finding the Fourth Proportional to 10,359.60, 15,515.10 and 7,054.80

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Solution

The fourth proportional to 10,359.60, 15,515.10 and 7,054.80 is: 10,565.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,359.60 : 15,515.10 = 7,054.80 : x
  2. Step 2: Convert to fraction form
    10,359.60/15,515.10 = 7,054.80/x
  3. Step 3: Cross multiply
    10,359.60x = 15,515.10 × 7,054.80
  4. Step 4: Simplify right side
    10,359.60x = 109,455,927.48
  5. Step 5: Solve for x
    x = 109,455,927.48/10,359.60
  6. Step 6: Final answer
    x = 10,565.65

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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.