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Finding the Fourth Proportional to 53,281.46, 79,926.16 and 13,838.78

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Solution

The fourth proportional to 53,281.46, 79,926.16 and 13,838.78 is: 20,759.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,281.46 : 79,926.16 = 13,838.78 : x
  2. Step 2: Convert to fraction form
    53,281.46/79,926.16 = 13,838.78/x
  3. Step 3: Cross multiply
    53,281.46x = 79,926.16 × 13,838.78
  4. Step 4: Simplify right side
    53,281.46x = 1,106,080,544.48
  5. Step 5: Solve for x
    x = 1,106,080,544.48/53,281.46
  6. Step 6: Final answer
    x = 20,759.20

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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.