Home / 30,988.18-42,763.80-16,840.90

Finding the Fourth Proportional to 30,988.18, 42,763.80 and 16,840.90

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Solution

The fourth proportional to 30,988.18, 42,763.80 and 16,840.90 is: 23,240.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,988.18 : 42,763.80 = 16,840.90 : x
  2. Step 2: Convert to fraction form
    30,988.18/42,763.80 = 16,840.90/x
  3. Step 3: Cross multiply
    30,988.18x = 42,763.80 × 16,840.90
  4. Step 4: Simplify right side
    30,988.18x = 720,180,879.42
  5. Step 5: Solve for x
    x = 720,180,879.42/30,988.18
  6. Step 6: Final answer
    x = 23,240.50

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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.