Home / 15,204.75-20,981.08-10,428.79

Finding the Fourth Proportional to 15,204.75, 20,981.08 and 10,428.79

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Solution

The fourth proportional to 15,204.75, 20,981.08 and 10,428.79 is: 14,390.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,204.75 : 20,981.08 = 10,428.79 : x
  2. Step 2: Convert to fraction form
    15,204.75/20,981.08 = 10,428.79/x
  3. Step 3: Cross multiply
    15,204.75x = 20,981.08 × 10,428.79
  4. Step 4: Simplify right side
    15,204.75x = 218,807,277.29
  5. Step 5: Solve for x
    x = 218,807,277.29/15,204.75
  6. Step 6: Final answer
    x = 14,390.72

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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.