Home / 20,521.89-28,332.45-13,460.58

Finding the Fourth Proportional to 20,521.89, 28,332.45 and 13,460.58

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Solution

The fourth proportional to 20,521.89, 28,332.45 and 13,460.58 is: 18,583.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.89 : 28,332.45 = 13,460.58 : x
  2. Step 2: Convert to fraction form
    20,521.89/28,332.45 = 13,460.58/x
  3. Step 3: Cross multiply
    20,521.89x = 28,332.45 × 13,460.58
  4. Step 4: Simplify right side
    20,521.89x = 381,371,209.82
  5. Step 5: Solve for x
    x = 381,371,209.82/20,521.89
  6. Step 6: Final answer
    x = 18,583.63

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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.