Home / 21,512.55-29,701.62-15,853.68

Finding the Fourth Proportional to 21,512.55, 29,701.62 and 15,853.68

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Solution

The fourth proportional to 21,512.55, 29,701.62 and 15,853.68 is: 21,888.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.55 : 29,701.62 = 15,853.68 : x
  2. Step 2: Convert to fraction form
    21,512.55/29,701.62 = 15,853.68/x
  3. Step 3: Cross multiply
    21,512.55x = 29,701.62 × 15,853.68
  4. Step 4: Simplify right side
    21,512.55x = 470,879,978.96
  5. Step 5: Solve for x
    x = 470,879,978.96/21,512.55
  6. Step 6: Final answer
    x = 21,888.62

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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.