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Finding the Fourth Proportional to 27,888.76, 38,486.62 and 15,313.50

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Solution

The fourth proportional to 27,888.76, 38,486.62 and 15,313.50 is: 21,132.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,888.76 : 38,486.62 = 15,313.50 : x
  2. Step 2: Convert to fraction form
    27,888.76/38,486.62 = 15,313.50/x
  3. Step 3: Cross multiply
    27,888.76x = 38,486.62 × 15,313.50
  4. Step 4: Simplify right side
    27,888.76x = 589,364,855.37
  5. Step 5: Solve for x
    x = 589,364,855.37/27,888.76
  6. Step 6: Final answer
    x = 21,132.70

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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.