Home / 13,126.42-18,113.79-7,157.80

Finding the Fourth Proportional to 13,126.42, 18,113.79 and 7,157.80

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Solution

The fourth proportional to 13,126.42, 18,113.79 and 7,157.80 is: 9,877.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.42 : 18,113.79 = 7,157.80 : x
  2. Step 2: Convert to fraction form
    13,126.42/18,113.79 = 7,157.80/x
  3. Step 3: Cross multiply
    13,126.42x = 18,113.79 × 7,157.80
  4. Step 4: Simplify right side
    13,126.42x = 129,654,886.06
  5. Step 5: Solve for x
    x = 129,654,886.06/13,126.42
  6. Step 6: Final answer
    x = 9,877.40

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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.