Home / 9,125.48-13,688.40-5,429.12

Finding the Fourth Proportional to 9,125.48, 13,688.40 and 5,429.12

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Solution

The fourth proportional to 9,125.48, 13,688.40 and 5,429.12 is: 8,143.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,125.48 : 13,688.40 = 5,429.12 : x
  2. Step 2: Convert to fraction form
    9,125.48/13,688.40 = 5,429.12/x
  3. Step 3: Cross multiply
    9,125.48x = 13,688.40 × 5,429.12
  4. Step 4: Simplify right side
    9,125.48x = 74,315,966.21
  5. Step 5: Solve for x
    x = 74,315,966.21/9,125.48
  6. Step 6: Final answer
    x = 8,143.79

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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.