Home / 20,510.80-28,307.64-11,560.12

Finding the Fourth Proportional to 20,510.80, 28,307.64 and 11,560.12

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Solution

The fourth proportional to 20,510.80, 28,307.64 and 11,560.12 is: 15,954.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.80 : 28,307.64 = 11,560.12 : x
  2. Step 2: Convert to fraction form
    20,510.80/28,307.64 = 11,560.12/x
  3. Step 3: Cross multiply
    20,510.80x = 28,307.64 × 11,560.12
  4. Step 4: Simplify right side
    20,510.80x = 327,239,715.32
  5. Step 5: Solve for x
    x = 327,239,715.32/20,510.80
  6. Step 6: Final answer
    x = 15,954.51

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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.