Home / 30,320.40-45,502.20-12,802.80

Finding the Fourth Proportional to 30,320.40, 45,502.20 and 12,802.80

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Solution

The fourth proportional to 30,320.40, 45,502.20 and 12,802.80 is: 19,213.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,320.40 : 45,502.20 = 12,802.80 : x
  2. Step 2: Convert to fraction form
    30,320.40/45,502.20 = 12,802.80/x
  3. Step 3: Cross multiply
    30,320.40x = 45,502.20 × 12,802.80
  4. Step 4: Simplify right side
    30,320.40x = 582,555,566.16
  5. Step 5: Solve for x
    x = 582,555,566.16/30,320.40
  6. Step 6: Final answer
    x = 19,213.32

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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.