Home / 21,225.75-31,838.51-5,430.76

Finding the Fourth Proportional to 21,225.75, 31,838.51 and 5,430.76

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Solution

The fourth proportional to 21,225.75, 31,838.51 and 5,430.76 is: 8,146.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225.75 : 31,838.51 = 5,430.76 : x
  2. Step 2: Convert to fraction form
    21,225.75/31,838.51 = 5,430.76/x
  3. Step 3: Cross multiply
    21,225.75x = 31,838.51 × 5,430.76
  4. Step 4: Simplify right side
    21,225.75x = 172,907,306.57
  5. Step 5: Solve for x
    x = 172,907,306.57/21,225.75
  6. Step 6: Final answer
    x = 8,146.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.