Home / 30,639.84-42,254.85-19,873.45

Finding the Fourth Proportional to 30,639.84, 42,254.85 and 19,873.45

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Solution

The fourth proportional to 30,639.84, 42,254.85 and 19,873.45 is: 27,407.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,639.84 : 42,254.85 = 19,873.45 : x
  2. Step 2: Convert to fraction form
    30,639.84/42,254.85 = 19,873.45/x
  3. Step 3: Cross multiply
    30,639.84x = 42,254.85 × 19,873.45
  4. Step 4: Simplify right side
    30,639.84x = 839,749,648.73
  5. Step 5: Solve for x
    x = 839,749,648.73/30,639.84
  6. Step 6: Final answer
    x = 27,407.12

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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.