Home / 12,688.17-19,009.77-8,531.67

Finding the Fourth Proportional to 12,688.17, 19,009.77 and 8,531.67

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Solution

The fourth proportional to 12,688.17, 19,009.77 and 8,531.67 is: 12,782.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.17 : 19,009.77 = 8,531.67 : x
  2. Step 2: Convert to fraction form
    12,688.17/19,009.77 = 8,531.67/x
  3. Step 3: Cross multiply
    12,688.17x = 19,009.77 × 8,531.67
  4. Step 4: Simplify right side
    12,688.17x = 162,185,084.42
  5. Step 5: Solve for x
    x = 162,185,084.42/12,688.17
  6. Step 6: Final answer
    x = 12,782.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.