Home / 8,688.90-11,989.01-5,499.95

Finding the Fourth Proportional to 8,688.90, 11,989.01 and 5,499.95

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Solution

The fourth proportional to 8,688.90, 11,989.01 and 5,499.95 is: 7,588.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.90 : 11,989.01 = 5,499.95 : x
  2. Step 2: Convert to fraction form
    8,688.90/11,989.01 = 5,499.95/x
  3. Step 3: Cross multiply
    8,688.90x = 11,989.01 × 5,499.95
  4. Step 4: Simplify right side
    8,688.90x = 65,938,948.67
  5. Step 5: Solve for x
    x = 65,938,948.67/8,688.90
  6. Step 6: Final answer
    x = 7,588.87

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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.