Home / 21,428.10-32,130.62-6,630.66

Finding the Fourth Proportional to 21,428.10, 32,130.62 and 6,630.66

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Solution

The fourth proportional to 21,428.10, 32,130.62 and 6,630.66 is: 9,942.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.10 : 32,130.62 = 6,630.66 : x
  2. Step 2: Convert to fraction form
    21,428.10/32,130.62 = 6,630.66/x
  3. Step 3: Cross multiply
    21,428.10x = 32,130.62 × 6,630.66
  4. Step 4: Simplify right side
    21,428.10x = 213,047,216.81
  5. Step 5: Solve for x
    x = 213,047,216.81/21,428.10
  6. Step 6: Final answer
    x = 9,942.42

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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.