Home / 15,564.60-21,478.91-8,490.87

Finding the Fourth Proportional to 15,564.60, 21,478.91 and 8,490.87

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Solution

The fourth proportional to 15,564.60, 21,478.91 and 8,490.87 is: 11,717.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.60 : 21,478.91 = 8,490.87 : x
  2. Step 2: Convert to fraction form
    15,564.60/21,478.91 = 8,490.87/x
  3. Step 3: Cross multiply
    15,564.60x = 21,478.91 × 8,490.87
  4. Step 4: Simplify right side
    15,564.60x = 182,374,590.10
  5. Step 5: Solve for x
    x = 182,374,590.10/15,564.60
  6. Step 6: Final answer
    x = 11,717.27

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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.