Home / 20,510.45-30,778.63-11,762.45

Finding the Fourth Proportional to 20,510.45, 30,778.63 and 11,762.45

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Solution

The fourth proportional to 20,510.45, 30,778.63 and 11,762.45 is: 17,651.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.45 : 30,778.63 = 11,762.45 : x
  2. Step 2: Convert to fraction form
    20,510.45/30,778.63 = 11,762.45/x
  3. Step 3: Cross multiply
    20,510.45x = 30,778.63 × 11,762.45
  4. Step 4: Simplify right side
    20,510.45x = 362,031,883.74
  5. Step 5: Solve for x
    x = 362,031,883.74/20,510.45
  6. Step 6: Final answer
    x = 17,651.10

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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.