Home / 28,909.07-39,901.18-18,819.94

Finding the Fourth Proportional to 28,909.07, 39,901.18 and 18,819.94

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Solution

The fourth proportional to 28,909.07, 39,901.18 and 18,819.94 is: 25,975.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,909.07 : 39,901.18 = 18,819.94 : x
  2. Step 2: Convert to fraction form
    28,909.07/39,901.18 = 18,819.94/x
  3. Step 3: Cross multiply
    28,909.07x = 39,901.18 × 18,819.94
  4. Step 4: Simplify right side
    28,909.07x = 750,937,666.73
  5. Step 5: Solve for x
    x = 750,937,666.73/28,909.07
  6. Step 6: Final answer
    x = 25,975.85

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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.