Home / 9,011.28-12,429.20-5,285.28

Finding the Fourth Proportional to 9,011.28, 12,429.20 and 5,285.28

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Solution

The fourth proportional to 9,011.28, 12,429.20 and 5,285.28 is: 7,289.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,011.28 : 12,429.20 = 5,285.28 : x
  2. Step 2: Convert to fraction form
    9,011.28/12,429.20 = 5,285.28/x
  3. Step 3: Cross multiply
    9,011.28x = 12,429.20 × 5,285.28
  4. Step 4: Simplify right side
    9,011.28x = 65,691,802.18
  5. Step 5: Solve for x
    x = 65,691,802.18/9,011.28
  6. Step 6: Final answer
    x = 7,289.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.