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Finding the Fourth Proportional to 28,881.56, 39,856.56 and 15,633.56

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Solution

The fourth proportional to 28,881.56, 39,856.56 and 15,633.56 is: 21,574.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,881.56 : 39,856.56 = 15,633.56 : x
  2. Step 2: Convert to fraction form
    28,881.56/39,856.56 = 15,633.56/x
  3. Step 3: Cross multiply
    28,881.56x = 39,856.56 × 15,633.56
  4. Step 4: Simplify right side
    28,881.56x = 623,099,963.17
  5. Step 5: Solve for x
    x = 623,099,963.17/28,881.56
  6. Step 6: Final answer
    x = 21,574.32

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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.