Home / 30,768.95-42,461.16-16,621.79

Finding the Fourth Proportional to 30,768.95, 42,461.16 and 16,621.79

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Solution

The fourth proportional to 30,768.95, 42,461.16 and 16,621.79 is: 22,938.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,768.95 : 42,461.16 = 16,621.79 : x
  2. Step 2: Convert to fraction form
    30,768.95/42,461.16 = 16,621.79/x
  3. Step 3: Cross multiply
    30,768.95x = 42,461.16 × 16,621.79
  4. Step 4: Simplify right side
    30,768.95x = 705,780,272.37
  5. Step 5: Solve for x
    x = 705,780,272.37/30,768.95
  6. Step 6: Final answer
    x = 22,938.07

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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.