Home / 20,784.70-31,190.70-7,637.18

Finding the Fourth Proportional to 20,784.70, 31,190.70 and 7,637.18

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Solution

The fourth proportional to 20,784.70, 31,190.70 and 7,637.18 is: 11,460.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.70 : 31,190.70 = 7,637.18 : x
  2. Step 2: Convert to fraction form
    20,784.70/31,190.70 = 7,637.18/x
  3. Step 3: Cross multiply
    20,784.70x = 31,190.70 × 7,637.18
  4. Step 4: Simplify right side
    20,784.70x = 238,208,990.23
  5. Step 5: Solve for x
    x = 238,208,990.23/20,784.70
  6. Step 6: Final answer
    x = 11,460.79

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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.