Home / 28,657.40-42,986.10-8,935.80

Finding the Fourth Proportional to 28,657.40, 42,986.10 and 8,935.80

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Solution

The fourth proportional to 28,657.40, 42,986.10 and 8,935.80 is: 13,403.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,657.40 : 42,986.10 = 8,935.80 : x
  2. Step 2: Convert to fraction form
    28,657.40/42,986.10 = 8,935.80/x
  3. Step 3: Cross multiply
    28,657.40x = 42,986.10 × 8,935.80
  4. Step 4: Simplify right side
    28,657.40x = 384,115,192.38
  5. Step 5: Solve for x
    x = 384,115,192.38/28,657.40
  6. Step 6: Final answer
    x = 13,403.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.