Home / 21,660.40-29,875.35-13,694.93

Finding the Fourth Proportional to 21,660.40, 29,875.35 and 13,694.93

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Solution

The fourth proportional to 21,660.40, 29,875.35 and 13,694.93 is: 18,888.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.40 : 29,875.35 = 13,694.93 : x
  2. Step 2: Convert to fraction form
    21,660.40/29,875.35 = 13,694.93/x
  3. Step 3: Cross multiply
    21,660.40x = 29,875.35 × 13,694.93
  4. Step 4: Simplify right side
    21,660.40x = 409,140,826.98
  5. Step 5: Solve for x
    x = 409,140,826.98/21,660.40
  6. Step 6: Final answer
    x = 18,888.89

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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.