Home / 21,541.87-29,707.72-13,980.12

Finding the Fourth Proportional to 21,541.87, 29,707.72 and 13,980.12

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Solution

The fourth proportional to 21,541.87, 29,707.72 and 13,980.12 is: 19,279.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,541.87 : 29,707.72 = 13,980.12 : x
  2. Step 2: Convert to fraction form
    21,541.87/29,707.72 = 13,980.12/x
  3. Step 3: Cross multiply
    21,541.87x = 29,707.72 × 13,980.12
  4. Step 4: Simplify right side
    21,541.87x = 415,317,490.53
  5. Step 5: Solve for x
    x = 415,317,490.53/21,541.87
  6. Step 6: Final answer
    x = 19,279.55

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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.