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Finding the Fourth Proportional to 28,881.63, 39,856.95 and 16,945.16

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Solution

The fourth proportional to 28,881.63, 39,856.95 and 16,945.16 is: 23,384.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,881.63 : 39,856.95 = 16,945.16 : x
  2. Step 2: Convert to fraction form
    28,881.63/39,856.95 = 16,945.16/x
  3. Step 3: Cross multiply
    28,881.63x = 39,856.95 × 16,945.16
  4. Step 4: Simplify right side
    28,881.63x = 675,382,394.86
  5. Step 5: Solve for x
    x = 675,382,394.86/28,881.63
  6. Step 6: Final answer
    x = 23,384.50

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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.