Home / 15,320.43-21,142.74-8,605.91

Finding the Fourth Proportional to 15,320.43, 21,142.74 and 8,605.91

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Solution

The fourth proportional to 15,320.43, 21,142.74 and 8,605.91 is: 11,876.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.43 : 21,142.74 = 8,605.91 : x
  2. Step 2: Convert to fraction form
    15,320.43/21,142.74 = 8,605.91/x
  3. Step 3: Cross multiply
    15,320.43x = 21,142.74 × 8,605.91
  4. Step 4: Simplify right side
    15,320.43x = 181,952,602.72
  5. Step 5: Solve for x
    x = 181,952,602.72/15,320.43
  6. Step 6: Final answer
    x = 11,876.47

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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.