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Finding the Fourth Proportional to 27,886.68, 38,483.88 and 15,311.40

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Solution

The fourth proportional to 27,886.68, 38,483.88 and 15,311.40 is: 21,129.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,886.68 : 38,483.88 = 15,311.40 : x
  2. Step 2: Convert to fraction form
    27,886.68/38,483.88 = 15,311.40/x
  3. Step 3: Cross multiply
    27,886.68x = 38,483.88 × 15,311.40
  4. Step 4: Simplify right side
    27,886.68x = 589,242,080.23
  5. Step 5: Solve for x
    x = 589,242,080.23/27,886.68
  6. Step 6: Final answer
    x = 21,129.88

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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.