Home / 10,030.70-15,078.45-7,129.10

Finding the Fourth Proportional to 10,030.70, 15,078.45 and 7,129.10

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Solution

The fourth proportional to 10,030.70, 15,078.45 and 7,129.10 is: 10,716.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,030.70 : 15,078.45 = 7,129.10 : x
  2. Step 2: Convert to fraction form
    10,030.70/15,078.45 = 7,129.10/x
  3. Step 3: Cross multiply
    10,030.70x = 15,078.45 × 7,129.10
  4. Step 4: Simplify right side
    10,030.70x = 107,495,777.90
  5. Step 5: Solve for x
    x = 107,495,777.90/10,030.70
  6. Step 6: Final answer
    x = 10,716.68

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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.