Home / 20,898.74-28,829.84-12,397.12

Finding the Fourth Proportional to 20,898.74, 28,829.84 and 12,397.12

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Solution

The fourth proportional to 20,898.74, 28,829.84 and 12,397.12 is: 17,101.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.74 : 28,829.84 = 12,397.12 : x
  2. Step 2: Convert to fraction form
    20,898.74/28,829.84 = 12,397.12/x
  3. Step 3: Cross multiply
    20,898.74x = 28,829.84 × 12,397.12
  4. Step 4: Simplify right side
    20,898.74x = 357,406,986.06
  5. Step 5: Solve for x
    x = 357,406,986.06/20,898.74
  6. Step 6: Final answer
    x = 17,101.84

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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.