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Finding the Fourth Proportional to 27,905.68, 38,509.68 and 15,330.16

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Solution

The fourth proportional to 27,905.68, 38,509.68 and 15,330.16 is: 21,155.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,905.68 : 38,509.68 = 15,330.16 : x
  2. Step 2: Convert to fraction form
    27,905.68/38,509.68 = 15,330.16/x
  3. Step 3: Cross multiply
    27,905.68x = 38,509.68 × 15,330.16
  4. Step 4: Simplify right side
    27,905.68x = 590,359,555.95
  5. Step 5: Solve for x
    x = 590,359,555.95/27,905.68
  6. Step 6: Final answer
    x = 21,155.53

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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.