Home / 28,510.20-42,739.38-12,919.32

Finding the Fourth Proportional to 28,510.20, 42,739.38 and 12,919.32

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Solution

The fourth proportional to 28,510.20, 42,739.38 and 12,919.32 is: 19,367.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,510.20 : 42,739.38 = 12,919.32 : x
  2. Step 2: Convert to fraction form
    28,510.20/42,739.38 = 12,919.32/x
  3. Step 3: Cross multiply
    28,510.20x = 42,739.38 × 12,919.32
  4. Step 4: Simplify right side
    28,510.20x = 552,163,726.82
  5. Step 5: Solve for x
    x = 552,163,726.82/28,510.20
  6. Step 6: Final answer
    x = 19,367.23

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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.