Home / 9,913.16-13,680.12-5,436.80

Finding the Fourth Proportional to 9,913.16, 13,680.12 and 5,436.80

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Solution

The fourth proportional to 9,913.16, 13,680.12 and 5,436.80 is: 7,502.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,913.16 : 13,680.12 = 5,436.80 : x
  2. Step 2: Convert to fraction form
    9,913.16/13,680.12 = 5,436.80/x
  3. Step 3: Cross multiply
    9,913.16x = 13,680.12 × 5,436.80
  4. Step 4: Simplify right side
    9,913.16x = 74,376,076.42
  5. Step 5: Solve for x
    x = 74,376,076.42/9,913.16
  6. Step 6: Final answer
    x = 7,502.76

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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.