Home / 21,870.80-32,822.40-8,732.60

Finding the Fourth Proportional to 21,870.80, 32,822.40 and 8,732.60

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Solution

The fourth proportional to 21,870.80, 32,822.40 and 8,732.60 is: 13,105.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,870.80 : 32,822.40 = 8,732.60 : x
  2. Step 2: Convert to fraction form
    21,870.80/32,822.40 = 8,732.60/x
  3. Step 3: Cross multiply
    21,870.80x = 32,822.40 × 8,732.60
  4. Step 4: Simplify right side
    21,870.80x = 286,624,890.24
  5. Step 5: Solve for x
    x = 286,624,890.24/21,870.80
  6. Step 6: Final answer
    x = 13,105.37

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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.