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Finding the Fourth Proportional to 21,081.87, 31,612.48 and 7,037.08

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Solution

The fourth proportional to 21,081.87, 31,612.48 and 7,037.08 is: 10,552.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.87 : 31,612.48 = 7,037.08 : x
  2. Step 2: Convert to fraction form
    21,081.87/31,612.48 = 7,037.08/x
  3. Step 3: Cross multiply
    21,081.87x = 31,612.48 × 7,037.08
  4. Step 4: Simplify right side
    21,081.87x = 222,459,454.13
  5. Step 5: Solve for x
    x = 222,459,454.13/21,081.87
  6. Step 6: Final answer
    x = 10,552.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.