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Finding the Fourth Proportional to 27,810.70, 38,378.79 and 15,873.80

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Solution

The fourth proportional to 27,810.70, 38,378.79 and 15,873.80 is: 21,905.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,810.70 : 38,378.79 = 15,873.80 : x
  2. Step 2: Convert to fraction form
    27,810.70/38,378.79 = 15,873.80/x
  3. Step 3: Cross multiply
    27,810.70x = 38,378.79 × 15,873.80
  4. Step 4: Simplify right side
    27,810.70x = 609,217,044.81
  5. Step 5: Solve for x
    x = 609,217,044.81/27,810.70
  6. Step 6: Final answer
    x = 21,905.85

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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.