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Finding the Fourth Proportional to 10,557.20, 15,835.80 and 6,678.80

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Solution

The fourth proportional to 10,557.20, 15,835.80 and 6,678.80 is: 10,018.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,557.20 : 15,835.80 = 6,678.80 : x
  2. Step 2: Convert to fraction form
    10,557.20/15,835.80 = 6,678.80/x
  3. Step 3: Cross multiply
    10,557.20x = 15,835.80 × 6,678.80
  4. Step 4: Simplify right side
    10,557.20x = 105,764,141.04
  5. Step 5: Solve for x
    x = 105,764,141.04/10,557.20
  6. Step 6: Final answer
    x = 10,018.20

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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.