Home / 15,711.16-21,681.16-8,637.44

Finding the Fourth Proportional to 15,711.16, 21,681.16 and 8,637.44

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Solution

The fourth proportional to 15,711.16, 21,681.16 and 8,637.44 is: 11,919.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.16 : 21,681.16 = 8,637.44 : x
  2. Step 2: Convert to fraction form
    15,711.16/21,681.16 = 8,637.44/x
  3. Step 3: Cross multiply
    15,711.16x = 21,681.16 × 8,637.44
  4. Step 4: Simplify right side
    15,711.16x = 187,269,718.63
  5. Step 5: Solve for x
    x = 187,269,718.63/15,711.16
  6. Step 6: Final answer
    x = 11,919.53

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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.