Home / 13,613.76-18,774.50-8,828.70

Finding the Fourth Proportional to 13,613.76, 18,774.50 and 8,828.70

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Solution

The fourth proportional to 13,613.76, 18,774.50 and 8,828.70 is: 12,175.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.76 : 18,774.50 = 8,828.70 : x
  2. Step 2: Convert to fraction form
    13,613.76/18,774.50 = 8,828.70/x
  3. Step 3: Cross multiply
    13,613.76x = 18,774.50 × 8,828.70
  4. Step 4: Simplify right side
    13,613.76x = 165,754,384.01
  5. Step 5: Solve for x
    x = 165,754,384.01/13,613.76
  6. Step 6: Final answer
    x = 12,175.50

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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.