Home / 21,511.32-29,684.34-12,557.76

Finding the Fourth Proportional to 21,511.32, 29,684.34 and 12,557.76

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Solution

The fourth proportional to 21,511.32, 29,684.34 and 12,557.76 is: 17,328.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.32 : 29,684.34 = 12,557.76 : x
  2. Step 2: Convert to fraction form
    21,511.32/29,684.34 = 12,557.76/x
  3. Step 3: Cross multiply
    21,511.32x = 29,684.34 × 12,557.76
  4. Step 4: Simplify right side
    21,511.32x = 372,768,817.48
  5. Step 5: Solve for x
    x = 372,768,817.48/21,511.32
  6. Step 6: Final answer
    x = 17,328.96

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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.