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Finding the Fourth Proportional to 27,999.70, 38,639.59 and 15,424.45

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Solution

The fourth proportional to 27,999.70, 38,639.59 and 15,424.45 is: 21,285.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,999.70 : 38,639.59 = 15,424.45 : x
  2. Step 2: Convert to fraction form
    27,999.70/38,639.59 = 15,424.45/x
  3. Step 3: Cross multiply
    27,999.70x = 38,639.59 × 15,424.45
  4. Step 4: Simplify right side
    27,999.70x = 595,994,288.82
  5. Step 5: Solve for x
    x = 595,994,288.82/27,999.70
  6. Step 6: Final answer
    x = 21,285.74

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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.