Home / 21,157.43-29,195.19-12,657.83

Finding the Fourth Proportional to 21,157.43, 29,195.19 and 12,657.83

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Solution

The fourth proportional to 21,157.43, 29,195.19 and 12,657.83 is: 17,466.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.43 : 29,195.19 = 12,657.83 : x
  2. Step 2: Convert to fraction form
    21,157.43/29,195.19 = 12,657.83/x
  3. Step 3: Cross multiply
    21,157.43x = 29,195.19 × 12,657.83
  4. Step 4: Simplify right side
    21,157.43x = 369,547,605.86
  5. Step 5: Solve for x
    x = 369,547,605.86/21,157.43
  6. Step 6: Final answer
    x = 17,466.57

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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.