Home / 39,888.32-55,045.17-21,983.40

Finding the Fourth Proportional to 39,888.32, 55,045.17 and 21,983.40

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Solution

The fourth proportional to 39,888.32, 55,045.17 and 21,983.40 is: 30,336.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,888.32 : 55,045.17 = 21,983.40 : x
  2. Step 2: Convert to fraction form
    39,888.32/55,045.17 = 21,983.40/x
  3. Step 3: Cross multiply
    39,888.32x = 55,045.17 × 21,983.40
  4. Step 4: Simplify right side
    39,888.32x = 1,210,079,990.18
  5. Step 5: Solve for x
    x = 1,210,079,990.18/39,888.32
  6. Step 6: Final answer
    x = 30,336.70

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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.