Home / 30,768.90-42,461.10-16,621.74

Finding the Fourth Proportional to 30,768.90, 42,461.10 and 16,621.74

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Solution

The fourth proportional to 30,768.90, 42,461.10 and 16,621.74 is: 22,938.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,768.90 : 42,461.10 = 16,621.74 : x
  2. Step 2: Convert to fraction form
    30,768.90/42,461.10 = 16,621.74/x
  3. Step 3: Cross multiply
    30,768.90x = 42,461.10 × 16,621.74
  4. Step 4: Simplify right side
    30,768.90x = 705,777,364.31
  5. Step 5: Solve for x
    x = 705,777,364.31/30,768.90
  6. Step 6: Final answer
    x = 22,938.01

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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.