Home / 15,615.08-21,545.88-9,240.20

Finding the Fourth Proportional to 15,615.08, 21,545.88 and 9,240.20

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Solution

The fourth proportional to 15,615.08, 21,545.88 and 9,240.20 is: 12,749.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,615.08 : 21,545.88 = 9,240.20 : x
  2. Step 2: Convert to fraction form
    15,615.08/21,545.88 = 9,240.20/x
  3. Step 3: Cross multiply
    15,615.08x = 21,545.88 × 9,240.20
  4. Step 4: Simplify right side
    15,615.08x = 199,088,240.38
  5. Step 5: Solve for x
    x = 199,088,240.38/15,615.08
  6. Step 6: Final answer
    x = 12,749.74

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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.