Home / 30,790.80-42,491.32-16,643.63

Finding the Fourth Proportional to 30,790.80, 42,491.32 and 16,643.63

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Solution

The fourth proportional to 30,790.80, 42,491.32 and 16,643.63 is: 22,968.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,790.80 : 42,491.32 = 16,643.63 : x
  2. Step 2: Convert to fraction form
    30,790.80/42,491.32 = 16,643.63/x
  3. Step 3: Cross multiply
    30,790.80x = 42,491.32 × 16,643.63
  4. Step 4: Simplify right side
    30,790.80x = 707,209,872.91
  5. Step 5: Solve for x
    x = 707,209,872.91/30,790.80
  6. Step 6: Final answer
    x = 22,968.22

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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.