Home / 20,702.64-28,570.15-11,271.72

Finding the Fourth Proportional to 20,702.64, 28,570.15 and 11,271.72

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Solution

The fourth proportional to 20,702.64, 28,570.15 and 11,271.72 is: 15,555.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.64 : 28,570.15 = 11,271.72 : x
  2. Step 2: Convert to fraction form
    20,702.64/28,570.15 = 11,271.72/x
  3. Step 3: Cross multiply
    20,702.64x = 28,570.15 × 11,271.72
  4. Step 4: Simplify right side
    20,702.64x = 322,034,588.31
  5. Step 5: Solve for x
    x = 322,034,588.31/20,702.64
  6. Step 6: Final answer
    x = 15,555.25

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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.