Home / 8,688.86-11,988.78-5,153.22

Finding the Fourth Proportional to 8,688.86, 11,988.78 and 5,153.22

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Solution

The fourth proportional to 8,688.86, 11,988.78 and 5,153.22 is: 7,110.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.86 : 11,988.78 = 5,153.22 : x
  2. Step 2: Convert to fraction form
    8,688.86/11,988.78 = 5,153.22/x
  3. Step 3: Cross multiply
    8,688.86x = 11,988.78 × 5,153.22
  4. Step 4: Simplify right side
    8,688.86x = 61,780,820.87
  5. Step 5: Solve for x
    x = 61,780,820.87/8,688.86
  6. Step 6: Final answer
    x = 7,110.35

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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.