Home / 28,159.20-42,238.80-7,384.80

Finding the Fourth Proportional to 28,159.20, 42,238.80 and 7,384.80

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Solution

The fourth proportional to 28,159.20, 42,238.80 and 7,384.80 is: 11,077.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,159.20 : 42,238.80 = 7,384.80 : x
  2. Step 2: Convert to fraction form
    28,159.20/42,238.80 = 7,384.80/x
  3. Step 3: Cross multiply
    28,159.20x = 42,238.80 × 7,384.80
  4. Step 4: Simplify right side
    28,159.20x = 311,925,090.24
  5. Step 5: Solve for x
    x = 311,925,090.24/28,159.20
  6. Step 6: Final answer
    x = 11,077.20

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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.