Home / 30,429.24-42,021.08-28,772.60

Finding the Fourth Proportional to 30,429.24, 42,021.08 and 28,772.60

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Solution

The fourth proportional to 30,429.24, 42,021.08 and 28,772.60 is: 39,733.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,429.24 : 42,021.08 = 28,772.60 : x
  2. Step 2: Convert to fraction form
    30,429.24/42,021.08 = 28,772.60/x
  3. Step 3: Cross multiply
    30,429.24x = 42,021.08 × 28,772.60
  4. Step 4: Simplify right side
    30,429.24x = 1,209,055,726.41
  5. Step 5: Solve for x
    x = 1,209,055,726.41/30,429.24
  6. Step 6: Final answer
    x = 39,733.35

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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.