Home / 30,431.36-42,024.02-28,774.71

Finding the Fourth Proportional to 30,431.36, 42,024.02 and 28,774.71

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Solution

The fourth proportional to 30,431.36, 42,024.02 and 28,774.71 is: 39,736.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,431.36 : 42,024.02 = 28,774.71 : x
  2. Step 2: Convert to fraction form
    30,431.36/42,024.02 = 28,774.71/x
  3. Step 3: Cross multiply
    30,431.36x = 42,024.02 × 28,774.71
  4. Step 4: Simplify right side
    30,431.36x = 1,209,228,844.66
  5. Step 5: Solve for x
    x = 1,209,228,844.66/30,431.36
  6. Step 6: Final answer
    x = 39,736.27

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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.