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Finding the Fourth Proportional to 40,886.70, 61,322.28 and 12,802.50

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Solution

The fourth proportional to 40,886.70, 61,322.28 and 12,802.50 is: 19,201.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,886.70 : 61,322.28 = 12,802.50 : x
  2. Step 2: Convert to fraction form
    40,886.70/61,322.28 = 12,802.50/x
  3. Step 3: Cross multiply
    40,886.70x = 61,322.28 × 12,802.50
  4. Step 4: Simplify right side
    40,886.70x = 785,078,489.70
  5. Step 5: Solve for x
    x = 785,078,489.70/40,886.70
  6. Step 6: Final answer
    x = 19,201.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.