Home / 21,050.25-31,558.60-12,155.49

Finding the Fourth Proportional to 21,050.25, 31,558.60 and 12,155.49

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Solution

The fourth proportional to 21,050.25, 31,558.60 and 12,155.49 is: 18,223.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,050.25 : 31,558.60 = 12,155.49 : x
  2. Step 2: Convert to fraction form
    21,050.25/31,558.60 = 12,155.49/x
  3. Step 3: Cross multiply
    21,050.25x = 31,558.60 × 12,155.49
  4. Step 4: Simplify right side
    21,050.25x = 383,610,246.71
  5. Step 5: Solve for x
    x = 383,610,246.71/21,050.25
  6. Step 6: Final answer
    x = 18,223.55

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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.