Home / 21,458.89-32,189.78-7,420.29

Finding the Fourth Proportional to 21,458.89, 32,189.78 and 7,420.29

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Solution

The fourth proportional to 21,458.89, 32,189.78 and 7,420.29 is: 11,130.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,458.89 : 32,189.78 = 7,420.29 : x
  2. Step 2: Convert to fraction form
    21,458.89/32,189.78 = 7,420.29/x
  3. Step 3: Cross multiply
    21,458.89x = 32,189.78 × 7,420.29
  4. Step 4: Simplify right side
    21,458.89x = 238,857,502.64
  5. Step 5: Solve for x
    x = 238,857,502.64/21,458.89
  6. Step 6: Final answer
    x = 11,130.93

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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.