Home / 15,403.04-21,257.16-8,687.96

Finding the Fourth Proportional to 15,403.04, 21,257.16 and 8,687.96

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Solution

The fourth proportional to 15,403.04, 21,257.16 and 8,687.96 is: 11,989.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.04 : 21,257.16 = 8,687.96 : x
  2. Step 2: Convert to fraction form
    15,403.04/21,257.16 = 8,687.96/x
  3. Step 3: Cross multiply
    15,403.04x = 21,257.16 × 8,687.96
  4. Step 4: Simplify right side
    15,403.04x = 184,681,355.79
  5. Step 5: Solve for x
    x = 184,681,355.79/15,403.04
  6. Step 6: Final answer
    x = 11,989.93

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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.