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Finding the Fourth Proportional to 20,569.80, 30,830.40 and 15,369.60

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Solution

The fourth proportional to 20,569.80, 30,830.40 and 15,369.60 is: 23,036.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.80 : 30,830.40 = 15,369.60 : x
  2. Step 2: Convert to fraction form
    20,569.80/30,830.40 = 15,369.60/x
  3. Step 3: Cross multiply
    20,569.80x = 30,830.40 × 15,369.60
  4. Step 4: Simplify right side
    20,569.80x = 473,850,915.84
  5. Step 5: Solve for x
    x = 473,850,915.84/20,569.80
  6. Step 6: Final answer
    x = 23,036.24

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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.