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Finding the Fourth Proportional to 25,368.48, 34,974.95 and 20,814.48

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Solution

The fourth proportional to 25,368.48, 34,974.95 and 20,814.48 is: 28,696.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,368.48 : 34,974.95 = 20,814.48 : x
  2. Step 2: Convert to fraction form
    25,368.48/34,974.95 = 20,814.48/x
  3. Step 3: Cross multiply
    25,368.48x = 34,974.95 × 20,814.48
  4. Step 4: Simplify right side
    25,368.48x = 727,985,293.20
  5. Step 5: Solve for x
    x = 727,985,293.20/25,368.48
  6. Step 6: Final answer
    x = 28,696.45

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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.