Home / 21,056.40-31,582.78-8,577.74

Finding the Fourth Proportional to 21,056.40, 31,582.78 and 8,577.74

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Solution

The fourth proportional to 21,056.40, 31,582.78 and 8,577.74 is: 12,865.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,056.40 : 31,582.78 = 8,577.74 : x
  2. Step 2: Convert to fraction form
    21,056.40/31,582.78 = 8,577.74/x
  3. Step 3: Cross multiply
    21,056.40x = 31,582.78 × 8,577.74
  4. Step 4: Simplify right side
    21,056.40x = 270,908,932.83
  5. Step 5: Solve for x
    x = 270,908,932.83/21,056.40
  6. Step 6: Final answer
    x = 12,865.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.