Home / 19,991.12-29,981.21-7,510.18

Finding the Fourth Proportional to 19,991.12, 29,981.21 and 7,510.18

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Solution

The fourth proportional to 19,991.12, 29,981.21 and 7,510.18 is: 11,263.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.12 : 29,981.21 = 7,510.18 : x
  2. Step 2: Convert to fraction form
    19,991.12/29,981.21 = 7,510.18/x
  3. Step 3: Cross multiply
    19,991.12x = 29,981.21 × 7,510.18
  4. Step 4: Simplify right side
    19,991.12x = 225,164,283.72
  5. Step 5: Solve for x
    x = 225,164,283.72/19,991.12
  6. Step 6: Final answer
    x = 11,263.22

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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.