Home / 21,390.23-32,090.81-8,239.07

Finding the Fourth Proportional to 21,390.23, 32,090.81 and 8,239.07

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Solution

The fourth proportional to 21,390.23, 32,090.81 and 8,239.07 is: 12,360.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.23 : 32,090.81 = 8,239.07 : x
  2. Step 2: Convert to fraction form
    21,390.23/32,090.81 = 8,239.07/x
  3. Step 3: Cross multiply
    21,390.23x = 32,090.81 × 8,239.07
  4. Step 4: Simplify right side
    21,390.23x = 264,398,228.30
  5. Step 5: Solve for x
    x = 264,398,228.30/21,390.23
  6. Step 6: Final answer
    x = 12,360.70

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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.