Home / 15,812.15-21,822.12-8,739.92

Finding the Fourth Proportional to 15,812.15, 21,822.12 and 8,739.92

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Solution

The fourth proportional to 15,812.15, 21,822.12 and 8,739.92 is: 12,061.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,812.15 : 21,822.12 = 8,739.92 : x
  2. Step 2: Convert to fraction form
    15,812.15/21,822.12 = 8,739.92/x
  3. Step 3: Cross multiply
    15,812.15x = 21,822.12 × 8,739.92
  4. Step 4: Simplify right side
    15,812.15x = 190,723,637.59
  5. Step 5: Solve for x
    x = 190,723,637.59/15,812.15
  6. Step 6: Final answer
    x = 12,061.84

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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.