Home / 20,802.40-31,203.60-19,733.20

Finding the Fourth Proportional to 20,802.40, 31,203.60 and 19,733.20

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Solution

The fourth proportional to 20,802.40, 31,203.60 and 19,733.20 is: 29,599.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.40 : 31,203.60 = 19,733.20 : x
  2. Step 2: Convert to fraction form
    20,802.40/31,203.60 = 19,733.20/x
  3. Step 3: Cross multiply
    20,802.40x = 31,203.60 × 19,733.20
  4. Step 4: Simplify right side
    20,802.40x = 615,746,879.52
  5. Step 5: Solve for x
    x = 615,746,879.52/20,802.40
  6. Step 6: Final answer
    x = 29,599.80

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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.