Home / 15,781.04-21,777.79-8,707.40

Finding the Fourth Proportional to 15,781.04, 21,777.79 and 8,707.40

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Solution

The fourth proportional to 15,781.04, 21,777.79 and 8,707.40 is: 12,016.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.04 : 21,777.79 = 8,707.40 : x
  2. Step 2: Convert to fraction form
    15,781.04/21,777.79 = 8,707.40/x
  3. Step 3: Cross multiply
    15,781.04x = 21,777.79 × 8,707.40
  4. Step 4: Simplify right side
    15,781.04x = 189,627,928.65
  5. Step 5: Solve for x
    x = 189,627,928.65/15,781.04
  6. Step 6: Final answer
    x = 12,016.19

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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.