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Finding the Fourth Proportional to 27,615.87, 38,110.91 and 15,678.90

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Solution

The fourth proportional to 27,615.87, 38,110.91 and 15,678.90 is: 21,637.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,615.87 : 38,110.91 = 15,678.90 : x
  2. Step 2: Convert to fraction form
    27,615.87/38,110.91 = 15,678.90/x
  3. Step 3: Cross multiply
    27,615.87x = 38,110.91 × 15,678.90
  4. Step 4: Simplify right side
    27,615.87x = 597,537,068.40
  5. Step 5: Solve for x
    x = 597,537,068.40/27,615.87
  6. Step 6: Final answer
    x = 21,637.45

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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.