Home / 10,520.24-15,780.32-4,280.16

Finding the Fourth Proportional to 10,520.24, 15,780.32 and 4,280.16

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Solution

The fourth proportional to 10,520.24, 15,780.32 and 4,280.16 is: 6,420.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,520.24 : 15,780.32 = 4,280.16 : x
  2. Step 2: Convert to fraction form
    10,520.24/15,780.32 = 4,280.16/x
  3. Step 3: Cross multiply
    10,520.24x = 15,780.32 × 4,280.16
  4. Step 4: Simplify right side
    10,520.24x = 67,542,294.45
  5. Step 5: Solve for x
    x = 67,542,294.45/10,520.24
  6. Step 6: Final answer
    x = 6,420.22

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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.