Home / 10,521.99-15,781.91-6,614.55

Finding the Fourth Proportional to 10,521.99, 15,781.91 and 6,614.55

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Solution

The fourth proportional to 10,521.99, 15,781.91 and 6,614.55 is: 9,921.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.99 : 15,781.91 = 6,614.55 : x
  2. Step 2: Convert to fraction form
    10,521.99/15,781.91 = 6,614.55/x
  3. Step 3: Cross multiply
    10,521.99x = 15,781.91 × 6,614.55
  4. Step 4: Simplify right side
    10,521.99x = 104,390,199.72
  5. Step 5: Solve for x
    x = 104,390,199.72/10,521.99
  6. Step 6: Final answer
    x = 9,921.15

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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.