Home / 13,280.68-18,307.20-10,918.72

Finding the Fourth Proportional to 13,280.68, 18,307.20 and 10,918.72

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Solution

The fourth proportional to 13,280.68, 18,307.20 and 10,918.72 is: 15,051.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.68 : 18,307.20 = 10,918.72 : x
  2. Step 2: Convert to fraction form
    13,280.68/18,307.20 = 10,918.72/x
  3. Step 3: Cross multiply
    13,280.68x = 18,307.20 × 10,918.72
  4. Step 4: Simplify right side
    13,280.68x = 199,891,190.78
  5. Step 5: Solve for x
    x = 199,891,190.78/13,280.68
  6. Step 6: Final answer
    x = 15,051.28

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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.