Home / 52,411.12-78,648.91-20,815.65

Finding the Fourth Proportional to 52,411.12, 78,648.91 and 20,815.65

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Solution

The fourth proportional to 52,411.12, 78,648.91 and 20,815.65 is: 31,236.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,411.12 : 78,648.91 = 20,815.65 : x
  2. Step 2: Convert to fraction form
    52,411.12/78,648.91 = 20,815.65/x
  3. Step 3: Cross multiply
    52,411.12x = 78,648.91 × 20,815.65
  4. Step 4: Simplify right side
    52,411.12x = 1,637,128,131.40
  5. Step 5: Solve for x
    x = 1,637,128,131.40/52,411.12
  6. Step 6: Final answer
    x = 31,236.28

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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.