Home / 15,377.52-21,221.36-8,663.40

Finding the Fourth Proportional to 15,377.52, 21,221.36 and 8,663.40

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Solution

The fourth proportional to 15,377.52, 21,221.36 and 8,663.40 is: 11,955.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,377.52 : 21,221.36 = 8,663.40 : x
  2. Step 2: Convert to fraction form
    15,377.52/21,221.36 = 8,663.40/x
  3. Step 3: Cross multiply
    15,377.52x = 21,221.36 × 8,663.40
  4. Step 4: Simplify right side
    15,377.52x = 183,849,130.22
  5. Step 5: Solve for x
    x = 183,849,130.22/15,377.52
  6. Step 6: Final answer
    x = 11,955.71

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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.