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Finding the Fourth Proportional to 15,473.86, 21,353.91 and 8,400.46

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Solution

The fourth proportional to 15,473.86, 21,353.91 and 8,400.46 is: 11,592.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,473.86 : 21,353.91 = 8,400.46 : x
  2. Step 2: Convert to fraction form
    15,473.86/21,353.91 = 8,400.46/x
  3. Step 3: Cross multiply
    15,473.86x = 21,353.91 × 8,400.46
  4. Step 4: Simplify right side
    15,473.86x = 179,382,666.80
  5. Step 5: Solve for x
    x = 179,382,666.80/15,473.86
  6. Step 6: Final answer
    x = 11,592.63

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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.