Home / 15,143.20-20,900.63-8,770.84

Finding the Fourth Proportional to 15,143.20, 20,900.63 and 8,770.84

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Solution

The fourth proportional to 15,143.20, 20,900.63 and 8,770.84 is: 12,105.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,143.20 : 20,900.63 = 8,770.84 : x
  2. Step 2: Convert to fraction form
    15,143.20/20,900.63 = 8,770.84/x
  3. Step 3: Cross multiply
    15,143.20x = 20,900.63 × 8,770.84
  4. Step 4: Simplify right side
    15,143.20x = 183,316,081.63
  5. Step 5: Solve for x
    x = 183,316,081.63/15,143.20
  6. Step 6: Final answer
    x = 12,105.50

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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.