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Finding the Fourth Proportional to 10,420.32, 15,617.25 and 7,504.32

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Solution

The fourth proportional to 10,420.32, 15,617.25 and 7,504.32 is: 11,246.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,420.32 : 15,617.25 = 7,504.32 : x
  2. Step 2: Convert to fraction form
    10,420.32/15,617.25 = 7,504.32/x
  3. Step 3: Cross multiply
    10,420.32x = 15,617.25 × 7,504.32
  4. Step 4: Simplify right side
    10,420.32x = 117,196,841.52
  5. Step 5: Solve for x
    x = 117,196,841.52/10,420.32
  6. Step 6: Final answer
    x = 11,246.95

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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.