Home / 30,972.44-42,761.86-21,298.01

Finding the Fourth Proportional to 30,972.44, 42,761.86 and 21,298.01

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Solution

The fourth proportional to 30,972.44, 42,761.86 and 21,298.01 is: 29,404.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,972.44 : 42,761.86 = 21,298.01 : x
  2. Step 2: Convert to fraction form
    30,972.44/42,761.86 = 21,298.01/x
  3. Step 3: Cross multiply
    30,972.44x = 42,761.86 × 21,298.01
  4. Step 4: Simplify right side
    30,972.44x = 910,742,254.84
  5. Step 5: Solve for x
    x = 910,742,254.84/30,972.44
  6. Step 6: Final answer
    x = 29,404.92

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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.