Home / 21,215.08-29,282.16-12,267.76

Finding the Fourth Proportional to 21,215.08, 29,282.16 and 12,267.76

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Solution

The fourth proportional to 21,215.08, 29,282.16 and 12,267.76 is: 16,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.08 : 29,282.16 = 12,267.76 : x
  2. Step 2: Convert to fraction form
    21,215.08/29,282.16 = 12,267.76/x
  3. Step 3: Cross multiply
    21,215.08x = 29,282.16 × 12,267.76
  4. Step 4: Simplify right side
    21,215.08x = 359,226,511.16
  5. Step 5: Solve for x
    x = 359,226,511.16/21,215.08
  6. Step 6: Final answer
    x = 16,932.60

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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.