Home / 28,208.12-42,312.70-10,686.20

Finding the Fourth Proportional to 28,208.12, 42,312.70 and 10,686.20

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Solution

The fourth proportional to 28,208.12, 42,312.70 and 10,686.20 is: 16,029.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,208.12 : 42,312.70 = 10,686.20 : x
  2. Step 2: Convert to fraction form
    28,208.12/42,312.70 = 10,686.20/x
  3. Step 3: Cross multiply
    28,208.12x = 42,312.70 × 10,686.20
  4. Step 4: Simplify right side
    28,208.12x = 452,161,974.74
  5. Step 5: Solve for x
    x = 452,161,974.74/28,208.12
  6. Step 6: Final answer
    x = 16,029.50

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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.