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Finding the Fourth Proportional to 30,919.98, 42,670.53 and 17,490.99

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Solution

The fourth proportional to 30,919.98, 42,670.53 and 17,490.99 is: 24,138.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,919.98 : 42,670.53 = 17,490.99 : x
  2. Step 2: Convert to fraction form
    30,919.98/42,670.53 = 17,490.99/x
  3. Step 3: Cross multiply
    30,919.98x = 42,670.53 × 17,490.99
  4. Step 4: Simplify right side
    30,919.98x = 746,349,973.54
  5. Step 5: Solve for x
    x = 746,349,973.54/30,919.98
  6. Step 6: Final answer
    x = 24,138.11

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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.