Home / 21,314.63-31,947.03-12,555.69

Finding the Fourth Proportional to 21,314.63, 31,947.03 and 12,555.69

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Solution

The fourth proportional to 21,314.63, 31,947.03 and 12,555.69 is: 18,818.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,314.63 : 31,947.03 = 12,555.69 : x
  2. Step 2: Convert to fraction form
    21,314.63/31,947.03 = 12,555.69/x
  3. Step 3: Cross multiply
    21,314.63x = 31,947.03 × 12,555.69
  4. Step 4: Simplify right side
    21,314.63x = 401,117,005.10
  5. Step 5: Solve for x
    x = 401,117,005.10/21,314.63
  6. Step 6: Final answer
    x = 18,818.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.