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Finding the Fourth Proportional to 13,445.52, 18,555.08 and 7,477.20

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Solution

The fourth proportional to 13,445.52, 18,555.08 and 7,477.20 is: 10,318.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.52 : 18,555.08 = 7,477.20 : x
  2. Step 2: Convert to fraction form
    13,445.52/18,555.08 = 7,477.20/x
  3. Step 3: Cross multiply
    13,445.52x = 18,555.08 × 7,477.20
  4. Step 4: Simplify right side
    13,445.52x = 138,740,044.18
  5. Step 5: Solve for x
    x = 138,740,044.18/13,445.52
  6. Step 6: Final answer
    x = 10,318.68

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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.