Home / 30,778.08-42,445.42-19,427.95

Finding the Fourth Proportional to 30,778.08, 42,445.42 and 19,427.95

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Solution

The fourth proportional to 30,778.08, 42,445.42 and 19,427.95 is: 26,792.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,778.08 : 42,445.42 = 19,427.95 : x
  2. Step 2: Convert to fraction form
    30,778.08/42,445.42 = 19,427.95/x
  3. Step 3: Cross multiply
    30,778.08x = 42,445.42 × 19,427.95
  4. Step 4: Simplify right side
    30,778.08x = 824,627,501.98
  5. Step 5: Solve for x
    x = 824,627,501.98/30,778.08
  6. Step 6: Final answer
    x = 26,792.69

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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.