Home / 20,901.69-28,842.42-12,402.35

Finding the Fourth Proportional to 20,901.69, 28,842.42 and 12,402.35

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Solution

The fourth proportional to 20,901.69, 28,842.42 and 12,402.35 is: 17,114.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.69 : 28,842.42 = 12,402.35 : x
  2. Step 2: Convert to fraction form
    20,901.69/28,842.42 = 12,402.35/x
  3. Step 3: Cross multiply
    20,901.69x = 28,842.42 × 12,402.35
  4. Step 4: Simplify right side
    20,901.69x = 357,713,643.47
  5. Step 5: Solve for x
    x = 357,713,643.47/20,901.69
  6. Step 6: Final answer
    x = 17,114.10

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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.