Home / 21,753.56-30,019.40-12,678.32

Finding the Fourth Proportional to 21,753.56, 30,019.40 and 12,678.32

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Solution

The fourth proportional to 21,753.56, 30,019.40 and 12,678.32 is: 17,495.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,753.56 : 30,019.40 = 12,678.32 : x
  2. Step 2: Convert to fraction form
    21,753.56/30,019.40 = 12,678.32/x
  3. Step 3: Cross multiply
    21,753.56x = 30,019.40 × 12,678.32
  4. Step 4: Simplify right side
    21,753.56x = 380,595,559.41
  5. Step 5: Solve for x
    x = 380,595,559.41/21,753.56
  6. Step 6: Final answer
    x = 17,495.78

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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.