Home / 11,521.28-15,898.12-6,485.40

Finding the Fourth Proportional to 11,521.28, 15,898.12 and 6,485.40

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Solution

The fourth proportional to 11,521.28, 15,898.12 and 6,485.40 is: 8,949.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,521.28 : 15,898.12 = 6,485.40 : x
  2. Step 2: Convert to fraction form
    11,521.28/15,898.12 = 6,485.40/x
  3. Step 3: Cross multiply
    11,521.28x = 15,898.12 × 6,485.40
  4. Step 4: Simplify right side
    11,521.28x = 103,105,754.79
  5. Step 5: Solve for x
    x = 103,105,754.79/11,521.28
  6. Step 6: Final answer
    x = 8,949.16

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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.