Home / 19,315.20-28,963.20-8,920.32

Finding the Fourth Proportional to 19,315.20, 28,963.20 and 8,920.32

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Solution

The fourth proportional to 19,315.20, 28,963.20 and 8,920.32 is: 13,376.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,315.20 : 28,963.20 = 8,920.32 : x
  2. Step 2: Convert to fraction form
    19,315.20/28,963.20 = 8,920.32/x
  3. Step 3: Cross multiply
    19,315.20x = 28,963.20 × 8,920.32
  4. Step 4: Simplify right side
    19,315.20x = 258,361,012.22
  5. Step 5: Solve for x
    x = 258,361,012.22/19,315.20
  6. Step 6: Final answer
    x = 13,376.05

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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.