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Finding the Fourth Proportional to 15,945.30, 22,012.29 and 9,980.28

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Solution

The fourth proportional to 15,945.30, 22,012.29 and 9,980.28 is: 13,777.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,945.30 : 22,012.29 = 9,980.28 : x
  2. Step 2: Convert to fraction form
    15,945.30/22,012.29 = 9,980.28/x
  3. Step 3: Cross multiply
    15,945.30x = 22,012.29 × 9,980.28
  4. Step 4: Simplify right side
    15,945.30x = 219,688,817.64
  5. Step 5: Solve for x
    x = 219,688,817.64/15,945.30
  6. Step 6: Final answer
    x = 13,777.65

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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.