Home / 30,568.98-42,188.71-20,359.45

Finding the Fourth Proportional to 30,568.98, 42,188.71 and 20,359.45

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Solution

The fourth proportional to 30,568.98, 42,188.71 and 20,359.45 is: 28,098.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,568.98 : 42,188.71 = 20,359.45 : x
  2. Step 2: Convert to fraction form
    30,568.98/42,188.71 = 20,359.45/x
  3. Step 3: Cross multiply
    30,568.98x = 42,188.71 × 20,359.45
  4. Step 4: Simplify right side
    30,568.98x = 858,939,000.45
  5. Step 5: Solve for x
    x = 858,939,000.45/30,568.98
  6. Step 6: Final answer
    x = 28,098.38

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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.