Home / 10,129.30-15,170.66-9,779.10

Finding the Fourth Proportional to 10,129.30, 15,170.66 and 9,779.10

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Solution

The fourth proportional to 10,129.30, 15,170.66 and 9,779.10 is: 14,646.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,129.30 : 15,170.66 = 9,779.10 : x
  2. Step 2: Convert to fraction form
    10,129.30/15,170.66 = 9,779.10/x
  3. Step 3: Cross multiply
    10,129.30x = 15,170.66 × 9,779.10
  4. Step 4: Simplify right side
    10,129.30x = 148,355,401.21
  5. Step 5: Solve for x
    x = 148,355,401.21/10,129.30
  6. Step 6: Final answer
    x = 14,646.17

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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.