Home / 10,919.52-15,056.10-9,131.04

Finding the Fourth Proportional to 10,919.52, 15,056.10 and 9,131.04

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Solution

The fourth proportional to 10,919.52, 15,056.10 and 9,131.04 is: 12,590.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,919.52 : 15,056.10 = 9,131.04 : x
  2. Step 2: Convert to fraction form
    10,919.52/15,056.10 = 9,131.04/x
  3. Step 3: Cross multiply
    10,919.52x = 15,056.10 × 9,131.04
  4. Step 4: Simplify right side
    10,919.52x = 137,477,851.34
  5. Step 5: Solve for x
    x = 137,477,851.34/10,919.52
  6. Step 6: Final answer
    x = 12,590.10

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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.