Home / 20,712.73-28,574.47-13,995.91

Finding the Fourth Proportional to 20,712.73, 28,574.47 and 13,995.91

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Solution

The fourth proportional to 20,712.73, 28,574.47 and 13,995.91 is: 19,308.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.73 : 28,574.47 = 13,995.91 : x
  2. Step 2: Convert to fraction form
    20,712.73/28,574.47 = 13,995.91/x
  3. Step 3: Cross multiply
    20,712.73x = 28,574.47 × 13,995.91
  4. Step 4: Simplify right side
    20,712.73x = 399,925,638.98
  5. Step 5: Solve for x
    x = 399,925,638.98/20,712.73
  6. Step 6: Final answer
    x = 19,308.21

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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.