Home / 30,785.18-42,463.30-21,225.47

Finding the Fourth Proportional to 30,785.18, 42,463.30 and 21,225.47

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Solution

The fourth proportional to 30,785.18, 42,463.30 and 21,225.47 is: 29,277.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,785.18 : 42,463.30 = 21,225.47 : x
  2. Step 2: Convert to fraction form
    30,785.18/42,463.30 = 21,225.47/x
  3. Step 3: Cross multiply
    30,785.18x = 42,463.30 × 21,225.47
  4. Step 4: Simplify right side
    30,785.18x = 901,303,287.93
  5. Step 5: Solve for x
    x = 901,303,287.93/30,785.18
  6. Step 6: Final answer
    x = 29,277.19

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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.