Home / 28,488.45-39,314.03-15,913.20

Finding the Fourth Proportional to 28,488.45, 39,314.03 and 15,913.20

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Solution

The fourth proportional to 28,488.45, 39,314.03 and 15,913.20 is: 21,960.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,488.45 : 39,314.03 = 15,913.20 : x
  2. Step 2: Convert to fraction form
    28,488.45/39,314.03 = 15,913.20/x
  3. Step 3: Cross multiply
    28,488.45x = 39,314.03 × 15,913.20
  4. Step 4: Simplify right side
    28,488.45x = 625,611,942.63
  5. Step 5: Solve for x
    x = 625,611,942.63/28,488.45
  6. Step 6: Final answer
    x = 21,960.20

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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.