Home / 15,564.32-21,478.82-8,490.89

Finding the Fourth Proportional to 15,564.32, 21,478.82 and 8,490.89

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Solution

The fourth proportional to 15,564.32, 21,478.82 and 8,490.89 is: 11,717.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.32 : 21,478.82 = 8,490.89 : x
  2. Step 2: Convert to fraction form
    15,564.32/21,478.82 = 8,490.89/x
  3. Step 3: Cross multiply
    15,564.32x = 21,478.82 × 8,490.89
  4. Step 4: Simplify right side
    15,564.32x = 182,374,148.10
  5. Step 5: Solve for x
    x = 182,374,148.10/15,564.32
  6. Step 6: Final answer
    x = 11,717.45

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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.