Home / 30,638.84-42,253.47-19,872.45

Finding the Fourth Proportional to 30,638.84, 42,253.47 and 19,872.45

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Solution

The fourth proportional to 30,638.84, 42,253.47 and 19,872.45 is: 27,405.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,638.84 : 42,253.47 = 19,872.45 : x
  2. Step 2: Convert to fraction form
    30,638.84/42,253.47 = 19,872.45/x
  3. Step 3: Cross multiply
    30,638.84x = 42,253.47 × 19,872.45
  4. Step 4: Simplify right side
    30,638.84x = 839,679,969.90
  5. Step 5: Solve for x
    x = 839,679,969.90/30,638.84
  6. Step 6: Final answer
    x = 27,405.74

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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.