Home / 30,817.78-42,528.49-16,670.59

Finding the Fourth Proportional to 30,817.78, 42,528.49 and 16,670.59

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Solution

The fourth proportional to 30,817.78, 42,528.49 and 16,670.59 is: 23,005.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,817.78 : 42,528.49 = 16,670.59 : x
  2. Step 2: Convert to fraction form
    30,817.78/42,528.49 = 16,670.59/x
  3. Step 3: Cross multiply
    30,817.78x = 42,528.49 × 16,670.59
  4. Step 4: Simplify right side
    30,817.78x = 708,975,020.11
  5. Step 5: Solve for x
    x = 708,975,020.11/30,817.78
  6. Step 6: Final answer
    x = 23,005.39

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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.