Home / 42,640.16-63,981.84-28,760

Finding the Fourth Proportional to 42,640.16, 63,981.84 and 28,760

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Solution

The fourth proportional to 42,640.16, 63,981.84 and 28,760 is: 43,154.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,640.16 : 63,981.84 = 28,760 : x
  2. Step 2: Convert to fraction form
    42,640.16/63,981.84 = 28,760/x
  3. Step 3: Cross multiply
    42,640.16x = 63,981.84 × 28,760
  4. Step 4: Simplify right side
    42,640.16x = 1,840,117,718.40
  5. Step 5: Solve for x
    x = 1,840,117,718.40/42,640.16
  6. Step 6: Final answer
    x = 43,154.57

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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.