Home / 21,520.68-29,699.88-12,089.28

Finding the Fourth Proportional to 21,520.68, 29,699.88 and 12,089.28

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Solution

The fourth proportional to 21,520.68, 29,699.88 and 12,089.28 is: 16,683.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.68 : 29,699.88 = 12,089.28 : x
  2. Step 2: Convert to fraction form
    21,520.68/29,699.88 = 12,089.28/x
  3. Step 3: Cross multiply
    21,520.68x = 29,699.88 × 12,089.28
  4. Step 4: Simplify right side
    21,520.68x = 359,050,165.29
  5. Step 5: Solve for x
    x = 359,050,165.29/21,520.68
  6. Step 6: Final answer
    x = 16,683.96

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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.