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Finding the Fourth Proportional to 15,055.24, 20,775 and 8,681.62

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Solution

The fourth proportional to 15,055.24, 20,775 and 8,681.62 is: 11,979.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,055.24 : 20,775 = 8,681.62 : x
  2. Step 2: Convert to fraction form
    15,055.24/20,775 = 8,681.62/x
  3. Step 3: Cross multiply
    15,055.24x = 20,775 × 8,681.62
  4. Step 4: Simplify right side
    15,055.24x = 180,360,655.50
  5. Step 5: Solve for x
    x = 180,360,655.50/15,055.24
  6. Step 6: Final answer
    x = 11,979.93

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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.