Home / 20,485.72-28,307.46-17,686.36

Finding the Fourth Proportional to 20,485.72, 28,307.46 and 17,686.36

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Solution

The fourth proportional to 20,485.72, 28,307.46 and 17,686.36 is: 24,439.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.72 : 28,307.46 = 17,686.36 : x
  2. Step 2: Convert to fraction form
    20,485.72/28,307.46 = 17,686.36/x
  3. Step 3: Cross multiply
    20,485.72x = 28,307.46 × 17,686.36
  4. Step 4: Simplify right side
    20,485.72x = 500,655,928.25
  5. Step 5: Solve for x
    x = 500,655,928.25/20,485.72
  6. Step 6: Final answer
    x = 24,439.26

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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.