Home / 15,708.42-21,677.10-8,538.30

Finding the Fourth Proportional to 15,708.42, 21,677.10 and 8,538.30

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Solution

The fourth proportional to 15,708.42, 21,677.10 and 8,538.30 is: 11,782.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,708.42 : 21,677.10 = 8,538.30 : x
  2. Step 2: Convert to fraction form
    15,708.42/21,677.10 = 8,538.30/x
  3. Step 3: Cross multiply
    15,708.42x = 21,677.10 × 8,538.30
  4. Step 4: Simplify right side
    15,708.42x = 185,085,582.93
  5. Step 5: Solve for x
    x = 185,085,582.93/15,708.42
  6. Step 6: Final answer
    x = 11,782.57

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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.