Home / 28,488.78-39,313.76-15,913.53

Finding the Fourth Proportional to 28,488.78, 39,313.76 and 15,913.53

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Solution

The fourth proportional to 28,488.78, 39,313.76 and 15,913.53 is: 21,960.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,488.78 : 39,313.76 = 15,913.53 : x
  2. Step 2: Convert to fraction form
    28,488.78/39,313.76 = 15,913.53/x
  3. Step 3: Cross multiply
    28,488.78x = 39,313.76 × 15,913.53
  4. Step 4: Simplify right side
    28,488.78x = 625,620,619.61
  5. Step 5: Solve for x
    x = 625,620,619.61/28,488.78
  6. Step 6: Final answer
    x = 21,960.25

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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.