Home / 15,679.40-21,637.60-8,605.86

Finding the Fourth Proportional to 15,679.40, 21,637.60 and 8,605.86

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Solution

The fourth proportional to 15,679.40, 21,637.60 and 8,605.86 is: 11,876.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,679.40 : 21,637.60 = 8,605.86 : x
  2. Step 2: Convert to fraction form
    15,679.40/21,637.60 = 8,605.86/x
  3. Step 3: Cross multiply
    15,679.40x = 21,637.60 × 8,605.86
  4. Step 4: Simplify right side
    15,679.40x = 186,210,156.34
  5. Step 5: Solve for x
    x = 186,210,156.34/15,679.40
  6. Step 6: Final answer
    x = 11,876.10

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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.