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Finding the Fourth Proportional to 30,973.46, 42,750.01 and 18,877.87

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Solution

The fourth proportional to 30,973.46, 42,750.01 and 18,877.87 is: 26,055.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,973.46 : 42,750.01 = 18,877.87 : x
  2. Step 2: Convert to fraction form
    30,973.46/42,750.01 = 18,877.87/x
  3. Step 3: Cross multiply
    30,973.46x = 42,750.01 × 18,877.87
  4. Step 4: Simplify right side
    30,973.46x = 807,029,208.31
  5. Step 5: Solve for x
    x = 807,029,208.31/30,973.46
  6. Step 6: Final answer
    x = 26,055.51

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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.