Home / 21,312.66-31,988.69-10,790.08

Finding the Fourth Proportional to 21,312.66, 31,988.69 and 10,790.08

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Solution

The fourth proportional to 21,312.66, 31,988.69 and 10,790.08 is: 16,195.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.66 : 31,988.69 = 10,790.08 : x
  2. Step 2: Convert to fraction form
    21,312.66/31,988.69 = 10,790.08/x
  3. Step 3: Cross multiply
    21,312.66x = 31,988.69 × 10,790.08
  4. Step 4: Simplify right side
    21,312.66x = 345,160,390.27
  5. Step 5: Solve for x
    x = 345,160,390.27/21,312.66
  6. Step 6: Final answer
    x = 16,195.09

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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.