Home / 15,564.20-21,478.77-8,490.74

Finding the Fourth Proportional to 15,564.20, 21,478.77 and 8,490.74

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Solution

The fourth proportional to 15,564.20, 21,478.77 and 8,490.74 is: 11,717.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.20 : 21,478.77 = 8,490.74 : x
  2. Step 2: Convert to fraction form
    15,564.20/21,478.77 = 8,490.74/x
  3. Step 3: Cross multiply
    15,564.20x = 21,478.77 × 8,490.74
  4. Step 4: Simplify right side
    15,564.20x = 182,370,544.20
  5. Step 5: Solve for x
    x = 182,370,544.20/15,564.20
  6. Step 6: Final answer
    x = 11,717.31

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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.