Home / 30,418.78-42,006.90-28,762.24

Finding the Fourth Proportional to 30,418.78, 42,006.90 and 28,762.24

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Solution

The fourth proportional to 30,418.78, 42,006.90 and 28,762.24 is: 39,719.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,418.78 : 42,006.90 = 28,762.24 : x
  2. Step 2: Convert to fraction form
    30,418.78/42,006.90 = 28,762.24/x
  3. Step 3: Cross multiply
    30,418.78x = 42,006.90 × 28,762.24
  4. Step 4: Simplify right side
    30,418.78x = 1,208,212,539.46
  5. Step 5: Solve for x
    x = 1,208,212,539.46/30,418.78
  6. Step 6: Final answer
    x = 39,719.30

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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.