Home / 11,125.28-15,348.52-7,145.84

Finding the Fourth Proportional to 11,125.28, 15,348.52 and 7,145.84

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Solution

The fourth proportional to 11,125.28, 15,348.52 and 7,145.84 is: 9,858.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,125.28 : 15,348.52 = 7,145.84 : x
  2. Step 2: Convert to fraction form
    11,125.28/15,348.52 = 7,145.84/x
  3. Step 3: Cross multiply
    11,125.28x = 15,348.52 × 7,145.84
  4. Step 4: Simplify right side
    11,125.28x = 109,678,068.16
  5. Step 5: Solve for x
    x = 109,678,068.16/11,125.28
  6. Step 6: Final answer
    x = 9,858.45

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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.