Home / 20,866.55-28,780.58-15,203.03

Finding the Fourth Proportional to 20,866.55, 28,780.58 and 15,203.03

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Solution

The fourth proportional to 20,866.55, 28,780.58 and 15,203.03 is: 20,969.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.55 : 28,780.58 = 15,203.03 : x
  2. Step 2: Convert to fraction form
    20,866.55/28,780.58 = 15,203.03/x
  3. Step 3: Cross multiply
    20,866.55x = 28,780.58 × 15,203.03
  4. Step 4: Simplify right side
    20,866.55x = 437,551,915.26
  5. Step 5: Solve for x
    x = 437,551,915.26/20,866.55
  6. Step 6: Final answer
    x = 20,969.06

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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.