Home / 30,415.78-42,002.76-28,759.24

Finding the Fourth Proportional to 30,415.78, 42,002.76 and 28,759.24

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Solution

The fourth proportional to 30,415.78, 42,002.76 and 28,759.24 is: 39,715.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,415.78 : 42,002.76 = 28,759.24 : x
  2. Step 2: Convert to fraction form
    30,415.78/42,002.76 = 28,759.24/x
  3. Step 3: Cross multiply
    30,415.78x = 42,002.76 × 28,759.24
  4. Step 4: Simplify right side
    30,415.78x = 1,207,967,455.50
  5. Step 5: Solve for x
    x = 1,207,967,455.50/30,415.78
  6. Step 6: Final answer
    x = 39,715.16

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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.