Home / 20,304.99-28,011.56-11,915.55

Finding the Fourth Proportional to 20,304.99, 28,011.56 and 11,915.55

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Solution

The fourth proportional to 20,304.99, 28,011.56 and 11,915.55 is: 16,437.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,304.99 : 28,011.56 = 11,915.55 : x
  2. Step 2: Convert to fraction form
    20,304.99/28,011.56 = 11,915.55/x
  3. Step 3: Cross multiply
    20,304.99x = 28,011.56 × 11,915.55
  4. Step 4: Simplify right side
    20,304.99x = 333,773,084.18
  5. Step 5: Solve for x
    x = 333,773,084.18/20,304.99
  6. Step 6: Final answer
    x = 16,437.98

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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.