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Finding the Fourth Proportional to 12,585.92, 18,870.60 and 7,047.44

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Solution

The fourth proportional to 12,585.92, 18,870.60 and 7,047.44 is: 10,566.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,585.92 : 18,870.60 = 7,047.44 : x
  2. Step 2: Convert to fraction form
    12,585.92/18,870.60 = 7,047.44/x
  3. Step 3: Cross multiply
    12,585.92x = 18,870.60 × 7,047.44
  4. Step 4: Simplify right side
    12,585.92x = 132,989,421.26
  5. Step 5: Solve for x
    x = 132,989,421.26/12,585.92
  6. Step 6: Final answer
    x = 10,566.52

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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.