Home / 42,647.31-63,970.34-18,948.56

Finding the Fourth Proportional to 42,647.31, 63,970.34 and 18,948.56

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Solution

The fourth proportional to 42,647.31, 63,970.34 and 18,948.56 is: 28,422.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,647.31 : 63,970.34 = 18,948.56 : x
  2. Step 2: Convert to fraction form
    42,647.31/63,970.34 = 18,948.56/x
  3. Step 3: Cross multiply
    42,647.31x = 63,970.34 × 18,948.56
  4. Step 4: Simplify right side
    42,647.31x = 1,212,145,411.12
  5. Step 5: Solve for x
    x = 1,212,145,411.12/42,647.31
  6. Step 6: Final answer
    x = 28,422.55

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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.