Home / 21,420.64-32,124.79-7,380.10

Finding the Fourth Proportional to 21,420.64, 32,124.79 and 7,380.10

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Solution

The fourth proportional to 21,420.64, 32,124.79 and 7,380.10 is: 11,068.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.64 : 32,124.79 = 7,380.10 : x
  2. Step 2: Convert to fraction form
    21,420.64/32,124.79 = 7,380.10/x
  3. Step 3: Cross multiply
    21,420.64x = 32,124.79 × 7,380.10
  4. Step 4: Simplify right side
    21,420.64x = 237,084,162.68
  5. Step 5: Solve for x
    x = 237,084,162.68/21,420.64
  6. Step 6: Final answer
    x = 11,068.02

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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.