Home / 30,964.95-42,738.45-20,355.57

Finding the Fourth Proportional to 30,964.95, 42,738.45 and 20,355.57

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Solution

The fourth proportional to 30,964.95, 42,738.45 and 20,355.57 is: 28,095.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,964.95 : 42,738.45 = 20,355.57 : x
  2. Step 2: Convert to fraction form
    30,964.95/42,738.45 = 20,355.57/x
  3. Step 3: Cross multiply
    30,964.95x = 42,738.45 × 20,355.57
  4. Step 4: Simplify right side
    30,964.95x = 869,965,510.67
  5. Step 5: Solve for x
    x = 869,965,510.67/30,964.95
  6. Step 6: Final answer
    x = 28,095.17

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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.