Home / 20,623.95-28,456.13-12,557.51

Finding the Fourth Proportional to 20,623.95, 28,456.13 and 12,557.51

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Solution

The fourth proportional to 20,623.95, 28,456.13 and 12,557.51 is: 17,326.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623.95 : 28,456.13 = 12,557.51 : x
  2. Step 2: Convert to fraction form
    20,623.95/28,456.13 = 12,557.51/x
  3. Step 3: Cross multiply
    20,623.95x = 28,456.13 × 12,557.51
  4. Step 4: Simplify right side
    20,623.95x = 357,338,137.04
  5. Step 5: Solve for x
    x = 357,338,137.04/20,623.95
  6. Step 6: Final answer
    x = 17,326.37

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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.