Home / 30,990.77-42,767.10-17,564.57

Finding the Fourth Proportional to 30,990.77, 42,767.10 and 17,564.57

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Solution

The fourth proportional to 30,990.77, 42,767.10 and 17,564.57 is: 24,239.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,990.77 : 42,767.10 = 17,564.57 : x
  2. Step 2: Convert to fraction form
    30,990.77/42,767.10 = 17,564.57/x
  3. Step 3: Cross multiply
    30,990.77x = 42,767.10 × 17,564.57
  4. Step 4: Simplify right side
    30,990.77x = 751,185,721.65
  5. Step 5: Solve for x
    x = 751,185,721.65/30,990.77
  6. Step 6: Final answer
    x = 24,239.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.