Home / 21,284.02-31,905.12-7,947.25

Finding the Fourth Proportional to 21,284.02, 31,905.12 and 7,947.25

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Solution

The fourth proportional to 21,284.02, 31,905.12 and 7,947.25 is: 11,913.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,284.02 : 31,905.12 = 7,947.25 : x
  2. Step 2: Convert to fraction form
    21,284.02/31,905.12 = 7,947.25/x
  3. Step 3: Cross multiply
    21,284.02x = 31,905.12 × 7,947.25
  4. Step 4: Simplify right side
    21,284.02x = 253,557,964.92
  5. Step 5: Solve for x
    x = 253,557,964.92/21,284.02
  6. Step 6: Final answer
    x = 11,913.07

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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.