Home / 28,146.12-38,840.04-15,570

Finding the Fourth Proportional to 28,146.12, 38,840.04 and 15,570

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Solution

The fourth proportional to 28,146.12, 38,840.04 and 15,570 is: 21,485.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,146.12 : 38,840.04 = 15,570 : x
  2. Step 2: Convert to fraction form
    28,146.12/38,840.04 = 15,570/x
  3. Step 3: Cross multiply
    28,146.12x = 38,840.04 × 15,570
  4. Step 4: Simplify right side
    28,146.12x = 604,739,422.80
  5. Step 5: Solve for x
    x = 604,739,422.80/28,146.12
  6. Step 6: Final answer
    x = 21,485.71

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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.