Home / 39,515.20-59,176.80-21,006.40

Finding the Fourth Proportional to 39,515.20, 59,176.80 and 21,006.40

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Solution

The fourth proportional to 39,515.20, 59,176.80 and 21,006.40 is: 31,458.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,515.20 : 59,176.80 = 21,006.40 : x
  2. Step 2: Convert to fraction form
    39,515.20/59,176.80 = 21,006.40/x
  3. Step 3: Cross multiply
    39,515.20x = 59,176.80 × 21,006.40
  4. Step 4: Simplify right side
    39,515.20x = 1,243,091,531.52
  5. Step 5: Solve for x
    x = 1,243,091,531.52/39,515.20
  6. Step 6: Final answer
    x = 31,458.57

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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.