Home / 21,670.08-29,901.68-12,108.76

Finding the Fourth Proportional to 21,670.08, 29,901.68 and 12,108.76

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Solution

The fourth proportional to 21,670.08, 29,901.68 and 12,108.76 is: 16,708.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,670.08 : 29,901.68 = 12,108.76 : x
  2. Step 2: Convert to fraction form
    21,670.08/29,901.68 = 12,108.76/x
  3. Step 3: Cross multiply
    21,670.08x = 29,901.68 × 12,108.76
  4. Step 4: Simplify right side
    21,670.08x = 362,072,266.72
  5. Step 5: Solve for x
    x = 362,072,266.72/21,670.08
  6. Step 6: Final answer
    x = 16,708.40

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Half scale
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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.