Home / 10,300.20-15,428.70-8,572.20

Finding the Fourth Proportional to 10,300.20, 15,428.70 and 8,572.20

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Solution

The fourth proportional to 10,300.20, 15,428.70 and 8,572.20 is: 12,840.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,300.20 : 15,428.70 = 8,572.20 : x
  2. Step 2: Convert to fraction form
    10,300.20/15,428.70 = 8,572.20/x
  3. Step 3: Cross multiply
    10,300.20x = 15,428.70 × 8,572.20
  4. Step 4: Simplify right side
    10,300.20x = 132,257,902.14
  5. Step 5: Solve for x
    x = 132,257,902.14/10,300.20
  6. Step 6: Final answer
    x = 12,840.32

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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.