Home / 21,139.80-31,666.64-10,012.76

Finding the Fourth Proportional to 21,139.80, 31,666.64 and 10,012.76

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Solution

The fourth proportional to 21,139.80, 31,666.64 and 10,012.76 is: 14,998.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.80 : 31,666.64 = 10,012.76 : x
  2. Step 2: Convert to fraction form
    21,139.80/31,666.64 = 10,012.76/x
  3. Step 3: Cross multiply
    21,139.80x = 31,666.64 × 10,012.76
  4. Step 4: Simplify right side
    21,139.80x = 317,070,466.33
  5. Step 5: Solve for x
    x = 317,070,466.33/21,139.80
  6. Step 6: Final answer
    x = 14,998.74

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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.