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Finding the Fourth Proportional to 39,887.53, 55,045.16 and 21,983.19

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Solution

The fourth proportional to 39,887.53, 55,045.16 and 21,983.19 is: 30,337.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,887.53 : 55,045.16 = 21,983.19 : x
  2. Step 2: Convert to fraction form
    39,887.53/55,045.16 = 21,983.19/x
  3. Step 3: Cross multiply
    39,887.53x = 55,045.16 × 21,983.19
  4. Step 4: Simplify right side
    39,887.53x = 1,210,068,210.86
  5. Step 5: Solve for x
    x = 1,210,068,210.86/39,887.53
  6. Step 6: Final answer
    x = 30,337.01

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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.