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Finding the Fourth Proportional to 15,927.71, 21,980.99 and 8,854.25

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Solution

The fourth proportional to 15,927.71, 21,980.99 and 8,854.25 is: 12,219.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,927.71 : 21,980.99 = 8,854.25 : x
  2. Step 2: Convert to fraction form
    15,927.71/21,980.99 = 8,854.25/x
  3. Step 3: Cross multiply
    15,927.71x = 21,980.99 × 8,854.25
  4. Step 4: Simplify right side
    15,927.71x = 194,625,180.71
  5. Step 5: Solve for x
    x = 194,625,180.71/15,927.71
  6. Step 6: Final answer
    x = 12,219.28

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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.