Home / 21,353.48-29,471.30-12,406.76

Finding the Fourth Proportional to 21,353.48, 29,471.30 and 12,406.76

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Solution

The fourth proportional to 21,353.48, 29,471.30 and 12,406.76 is: 17,123.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,353.48 : 29,471.30 = 12,406.76 : x
  2. Step 2: Convert to fraction form
    21,353.48/29,471.30 = 12,406.76/x
  3. Step 3: Cross multiply
    21,353.48x = 29,471.30 × 12,406.76
  4. Step 4: Simplify right side
    21,353.48x = 365,643,345.99
  5. Step 5: Solve for x
    x = 365,643,345.99/21,353.48
  6. Step 6: Final answer
    x = 17,123.36

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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.