Home / 10,349.20-15,528.60-5,424.40

Finding the Fourth Proportional to 10,349.20, 15,528.60 and 5,424.40

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Solution

The fourth proportional to 10,349.20, 15,528.60 and 5,424.40 is: 8,139.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,349.20 : 15,528.60 = 5,424.40 : x
  2. Step 2: Convert to fraction form
    10,349.20/15,528.60 = 5,424.40/x
  3. Step 3: Cross multiply
    10,349.20x = 15,528.60 × 5,424.40
  4. Step 4: Simplify right side
    10,349.20x = 84,233,337.84
  5. Step 5: Solve for x
    x = 84,233,337.84/10,349.20
  6. Step 6: Final answer
    x = 8,139.12

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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.