Home / 10,985.28-16,454.40-8,782.08

Finding the Fourth Proportional to 10,985.28, 16,454.40 and 8,782.08

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Solution

The fourth proportional to 10,985.28, 16,454.40 and 8,782.08 is: 13,154.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,985.28 : 16,454.40 = 8,782.08 : x
  2. Step 2: Convert to fraction form
    10,985.28/16,454.40 = 8,782.08/x
  3. Step 3: Cross multiply
    10,985.28x = 16,454.40 × 8,782.08
  4. Step 4: Simplify right side
    10,985.28x = 144,503,857.15
  5. Step 5: Solve for x
    x = 144,503,857.15/10,985.28
  6. Step 6: Final answer
    x = 13,154.32

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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.