Home / 28,918.40-39,907.20-16,343.12

Finding the Fourth Proportional to 28,918.40, 39,907.20 and 16,343.12

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Solution

The fourth proportional to 28,918.40, 39,907.20 and 16,343.12 is: 22,553.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,918.40 : 39,907.20 = 16,343.12 : x
  2. Step 2: Convert to fraction form
    28,918.40/39,907.20 = 16,343.12/x
  3. Step 3: Cross multiply
    28,918.40x = 39,907.20 × 16,343.12
  4. Step 4: Simplify right side
    28,918.40x = 652,208,158.46
  5. Step 5: Solve for x
    x = 652,208,158.46/28,918.40
  6. Step 6: Final answer
    x = 22,553.40

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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.