Home / 31,890.65-44,018.88-20,560.16

Finding the Fourth Proportional to 31,890.65, 44,018.88 and 20,560.16

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Solution

The fourth proportional to 31,890.65, 44,018.88 and 20,560.16 is: 28,379.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,890.65 : 44,018.88 = 20,560.16 : x
  2. Step 2: Convert to fraction form
    31,890.65/44,018.88 = 20,560.16/x
  3. Step 3: Cross multiply
    31,890.65x = 44,018.88 × 20,560.16
  4. Step 4: Simplify right side
    31,890.65x = 905,035,215.82
  5. Step 5: Solve for x
    x = 905,035,215.82/31,890.65
  6. Step 6: Final answer
    x = 28,379.33

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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.