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Finding the Fourth Proportional to 15,661.52, 21,493.06 and 15,550.80

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Solution

The fourth proportional to 15,661.52, 21,493.06 and 15,550.80 is: 21,341.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.52 : 21,493.06 = 15,550.80 : x
  2. Step 2: Convert to fraction form
    15,661.52/21,493.06 = 15,550.80/x
  3. Step 3: Cross multiply
    15,661.52x = 21,493.06 × 15,550.80
  4. Step 4: Simplify right side
    15,661.52x = 334,234,366.34
  5. Step 5: Solve for x
    x = 334,234,366.34/15,661.52
  6. Step 6: Final answer
    x = 21,341.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.