Home / 20,802.38-28,719.99-13,541.36

Finding the Fourth Proportional to 20,802.38, 28,719.99 and 13,541.36

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Solution

The fourth proportional to 20,802.38, 28,719.99 and 13,541.36 is: 18,695.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.38 : 28,719.99 = 13,541.36 : x
  2. Step 2: Convert to fraction form
    20,802.38/28,719.99 = 13,541.36/x
  3. Step 3: Cross multiply
    20,802.38x = 28,719.99 × 13,541.36
  4. Step 4: Simplify right side
    20,802.38x = 388,907,580.19
  5. Step 5: Solve for x
    x = 388,907,580.19/20,802.38
  6. Step 6: Final answer
    x = 18,695.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.