Home / 28,686.38-43,028.40-9,970.66

Finding the Fourth Proportional to 28,686.38, 43,028.40 and 9,970.66

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Solution

The fourth proportional to 28,686.38, 43,028.40 and 9,970.66 is: 14,955.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,686.38 : 43,028.40 = 9,970.66 : x
  2. Step 2: Convert to fraction form
    28,686.38/43,028.40 = 9,970.66/x
  3. Step 3: Cross multiply
    28,686.38x = 43,028.40 × 9,970.66
  4. Step 4: Simplify right side
    28,686.38x = 429,021,546.74
  5. Step 5: Solve for x
    x = 429,021,546.74/28,686.38
  6. Step 6: Final answer
    x = 14,955.58

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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.