Home / 12,290.70-18,432.45-5,715.30

Finding the Fourth Proportional to 12,290.70, 18,432.45 and 5,715.30

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Solution

The fourth proportional to 12,290.70, 18,432.45 and 5,715.30 is: 8,571.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,290.70 : 18,432.45 = 5,715.30 : x
  2. Step 2: Convert to fraction form
    12,290.70/18,432.45 = 5,715.30/x
  3. Step 3: Cross multiply
    12,290.70x = 18,432.45 × 5,715.30
  4. Step 4: Simplify right side
    12,290.70x = 105,346,981.49
  5. Step 5: Solve for x
    x = 105,346,981.49/12,290.70
  6. Step 6: Final answer
    x = 8,571.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.