Home / 21,886.89-30,202.11-12,934.77

Finding the Fourth Proportional to 21,886.89, 30,202.11 and 12,934.77

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Solution

The fourth proportional to 21,886.89, 30,202.11 and 12,934.77 is: 17,848.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,886.89 : 30,202.11 = 12,934.77 : x
  2. Step 2: Convert to fraction form
    21,886.89/30,202.11 = 12,934.77/x
  3. Step 3: Cross multiply
    21,886.89x = 30,202.11 × 12,934.77
  4. Step 4: Simplify right side
    21,886.89x = 390,657,346.36
  5. Step 5: Solve for x
    x = 390,657,346.36/21,886.89
  6. Step 6: Final answer
    x = 17,848.92

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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.