Home / 13,139.04-19,715.28-6,211.68

Finding the Fourth Proportional to 13,139.04, 19,715.28 and 6,211.68

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Solution

The fourth proportional to 13,139.04, 19,715.28 and 6,211.68 is: 9,320.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.04 : 19,715.28 = 6,211.68 : x
  2. Step 2: Convert to fraction form
    13,139.04/19,715.28 = 6,211.68/x
  3. Step 3: Cross multiply
    13,139.04x = 19,715.28 × 6,211.68
  4. Step 4: Simplify right side
    13,139.04x = 122,465,010.47
  5. Step 5: Solve for x
    x = 122,465,010.47/13,139.04
  6. Step 6: Final answer
    x = 9,320.70

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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.