Home / 13,938.02-20,911.14-5,613.76

Finding the Fourth Proportional to 13,938.02, 20,911.14 and 5,613.76

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Solution

The fourth proportional to 13,938.02, 20,911.14 and 5,613.76 is: 8,422.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.02 : 20,911.14 = 5,613.76 : x
  2. Step 2: Convert to fraction form
    13,938.02/20,911.14 = 5,613.76/x
  3. Step 3: Cross multiply
    13,938.02x = 20,911.14 × 5,613.76
  4. Step 4: Simplify right side
    13,938.02x = 117,390,014.01
  5. Step 5: Solve for x
    x = 117,390,014.01/13,938.02
  6. Step 6: Final answer
    x = 8,422.29

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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.