Home / 15,679.28-21,637.05-8,605.55

Finding the Fourth Proportional to 15,679.28, 21,637.05 and 8,605.55

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Solution

The fourth proportional to 15,679.28, 21,637.05 and 8,605.55 is: 11,875.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,679.28 : 21,637.05 = 8,605.55 : x
  2. Step 2: Convert to fraction form
    15,679.28/21,637.05 = 8,605.55/x
  3. Step 3: Cross multiply
    15,679.28x = 21,637.05 × 8,605.55
  4. Step 4: Simplify right side
    15,679.28x = 186,198,715.63
  5. Step 5: Solve for x
    x = 186,198,715.63/15,679.28
  6. Step 6: Final answer
    x = 11,875.46

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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.