Home / 10,521.36-15,778.80-8,881.92

Finding the Fourth Proportional to 10,521.36, 15,778.80 and 8,881.92

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Solution

The fourth proportional to 10,521.36, 15,778.80 and 8,881.92 is: 13,320.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.36 : 15,778.80 = 8,881.92 : x
  2. Step 2: Convert to fraction form
    10,521.36/15,778.80 = 8,881.92/x
  3. Step 3: Cross multiply
    10,521.36x = 15,778.80 × 8,881.92
  4. Step 4: Simplify right side
    10,521.36x = 140,146,039.30
  5. Step 5: Solve for x
    x = 140,146,039.30/10,521.36
  6. Step 6: Final answer
    x = 13,320.14

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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.