Home / 15,243.12-21,143.28-14,838.72

Finding the Fourth Proportional to 15,243.12, 21,143.28 and 14,838.72

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Solution

The fourth proportional to 15,243.12, 21,143.28 and 14,838.72 is: 20,582.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,243.12 : 21,143.28 = 14,838.72 : x
  2. Step 2: Convert to fraction form
    15,243.12/21,143.28 = 14,838.72/x
  3. Step 3: Cross multiply
    15,243.12x = 21,143.28 × 14,838.72
  4. Step 4: Simplify right side
    15,243.12x = 313,739,211.80
  5. Step 5: Solve for x
    x = 313,739,211.80/15,243.12
  6. Step 6: Final answer
    x = 20,582.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.