Home / 21,985.40-32,977.80-5,345.38

Finding the Fourth Proportional to 21,985.40, 32,977.80 and 5,345.38

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Solution

The fourth proportional to 21,985.40, 32,977.80 and 5,345.38 is: 8,018.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.40 : 32,977.80 = 5,345.38 : x
  2. Step 2: Convert to fraction form
    21,985.40/32,977.80 = 5,345.38/x
  3. Step 3: Cross multiply
    21,985.40x = 32,977.80 × 5,345.38
  4. Step 4: Simplify right side
    21,985.40x = 176,278,790.12
  5. Step 5: Solve for x
    x = 176,278,790.12/21,985.40
  6. Step 6: Final answer
    x = 8,018.00

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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.