Home / 15,679.04-21,637.86-8,605.40

Finding the Fourth Proportional to 15,679.04, 21,637.86 and 8,605.40

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Solution

The fourth proportional to 15,679.04, 21,637.86 and 8,605.40 is: 11,875.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,679.04 : 21,637.86 = 8,605.40 : x
  2. Step 2: Convert to fraction form
    15,679.04/21,637.86 = 8,605.40/x
  3. Step 3: Cross multiply
    15,679.04x = 21,637.86 × 8,605.40
  4. Step 4: Simplify right side
    15,679.04x = 186,202,440.44
  5. Step 5: Solve for x
    x = 186,202,440.44/15,679.04
  6. Step 6: Final answer
    x = 11,875.88

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.