Home / 21,285.72-31,909.14-7,427.16

Finding the Fourth Proportional to 21,285.72, 31,909.14 and 7,427.16

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Solution

The fourth proportional to 21,285.72, 31,909.14 and 7,427.16 is: 11,133.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.72 : 31,909.14 = 7,427.16 : x
  2. Step 2: Convert to fraction form
    21,285.72/31,909.14 = 7,427.16/x
  3. Step 3: Cross multiply
    21,285.72x = 31,909.14 × 7,427.16
  4. Step 4: Simplify right side
    21,285.72x = 236,994,288.24
  5. Step 5: Solve for x
    x = 236,994,288.24/21,285.72
  6. Step 6: Final answer
    x = 11,133.96

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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.