Home / 10,979.51-15,153.66-6,505.47

Finding the Fourth Proportional to 10,979.51, 15,153.66 and 6,505.47

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Solution

The fourth proportional to 10,979.51, 15,153.66 and 6,505.47 is: 8,978.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.51 : 15,153.66 = 6,505.47 : x
  2. Step 2: Convert to fraction form
    10,979.51/15,153.66 = 6,505.47/x
  3. Step 3: Cross multiply
    10,979.51x = 15,153.66 × 6,505.47
  4. Step 4: Simplify right side
    10,979.51x = 98,581,680.52
  5. Step 5: Solve for x
    x = 98,581,680.52/10,979.51
  6. Step 6: Final answer
    x = 8,978.70

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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.