Home / 42,911.16-64,282.93-20,389.78

Finding the Fourth Proportional to 42,911.16, 64,282.93 and 20,389.78

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Solution

The fourth proportional to 42,911.16, 64,282.93 and 20,389.78 is: 30,544.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,911.16 : 64,282.93 = 20,389.78 : x
  2. Step 2: Convert to fraction form
    42,911.16/64,282.93 = 20,389.78/x
  3. Step 3: Cross multiply
    42,911.16x = 64,282.93 × 20,389.78
  4. Step 4: Simplify right side
    42,911.16x = 1,310,714,800.46
  5. Step 5: Solve for x
    x = 1,310,714,800.46/42,911.16
  6. Step 6: Final answer
    x = 30,544.85

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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.