Home / 10,427.40-15,642.45-5,165.10

Finding the Fourth Proportional to 10,427.40, 15,642.45 and 5,165.10

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Solution

The fourth proportional to 10,427.40, 15,642.45 and 5,165.10 is: 7,748.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,427.40 : 15,642.45 = 5,165.10 : x
  2. Step 2: Convert to fraction form
    10,427.40/15,642.45 = 5,165.10/x
  3. Step 3: Cross multiply
    10,427.40x = 15,642.45 × 5,165.10
  4. Step 4: Simplify right side
    10,427.40x = 80,794,818.50
  5. Step 5: Solve for x
    x = 80,794,818.50/10,427.40
  6. Step 6: Final answer
    x = 7,748.32

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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.