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Finding the Fourth Proportional to 30,913.56, 42,645.02 and 19,563.93

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Solution

The fourth proportional to 30,913.56, 42,645.02 and 19,563.93 is: 26,988.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,913.56 : 42,645.02 = 19,563.93 : x
  2. Step 2: Convert to fraction form
    30,913.56/42,645.02 = 19,563.93/x
  3. Step 3: Cross multiply
    30,913.56x = 42,645.02 × 19,563.93
  4. Step 4: Simplify right side
    30,913.56x = 834,304,088.31
  5. Step 5: Solve for x
    x = 834,304,088.31/30,913.56
  6. Step 6: Final answer
    x = 26,988.29

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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.