Home / 10,139.60-15,209.40-7,029.20

Finding the Fourth Proportional to 10,139.60, 15,209.40 and 7,029.20

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Solution

The fourth proportional to 10,139.60, 15,209.40 and 7,029.20 is: 10,543.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,139.60 : 15,209.40 = 7,029.20 : x
  2. Step 2: Convert to fraction form
    10,139.60/15,209.40 = 7,029.20/x
  3. Step 3: Cross multiply
    10,139.60x = 15,209.40 × 7,029.20
  4. Step 4: Simplify right side
    10,139.60x = 106,909,914.48
  5. Step 5: Solve for x
    x = 106,909,914.48/10,139.60
  6. Step 6: Final answer
    x = 10,543.80

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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.