Home / 30,790.90-42,491.45-16,643.75

Finding the Fourth Proportional to 30,790.90, 42,491.45 and 16,643.75

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Solution

The fourth proportional to 30,790.90, 42,491.45 and 16,643.75 is: 22,968.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,790.90 : 42,491.45 = 16,643.75 : x
  2. Step 2: Convert to fraction form
    30,790.90/42,491.45 = 16,643.75/x
  3. Step 3: Cross multiply
    30,790.90x = 42,491.45 × 16,643.75
  4. Step 4: Simplify right side
    30,790.90x = 707,216,775.26
  5. Step 5: Solve for x
    x = 707,216,775.26/30,790.90
  6. Step 6: Final answer
    x = 22,968.37

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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.