Home / 15,372.86-21,214.67-8,657.15

Finding the Fourth Proportional to 15,372.86, 21,214.67 and 8,657.15

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Solution

The fourth proportional to 15,372.86, 21,214.67 and 8,657.15 is: 11,946.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,372.86 : 21,214.67 = 8,657.15 : x
  2. Step 2: Convert to fraction form
    15,372.86/21,214.67 = 8,657.15/x
  3. Step 3: Cross multiply
    15,372.86x = 21,214.67 × 8,657.15
  4. Step 4: Simplify right side
    15,372.86x = 183,658,431.03
  5. Step 5: Solve for x
    x = 183,658,431.03/15,372.86
  6. Step 6: Final answer
    x = 11,946.93

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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.