Home / 21,688.95-32,511.27-12,309.15

Finding the Fourth Proportional to 21,688.95, 32,511.27 and 12,309.15

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Solution

The fourth proportional to 21,688.95, 32,511.27 and 12,309.15 is: 18,451.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,688.95 : 32,511.27 = 12,309.15 : x
  2. Step 2: Convert to fraction form
    21,688.95/32,511.27 = 12,309.15/x
  3. Step 3: Cross multiply
    21,688.95x = 32,511.27 × 12,309.15
  4. Step 4: Simplify right side
    21,688.95x = 400,186,099.12
  5. Step 5: Solve for x
    x = 400,186,099.12/21,688.95
  6. Step 6: Final answer
    x = 18,451.15

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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.