Home / 20,702.79-28,569.65-11,271.29

Finding the Fourth Proportional to 20,702.79, 28,569.65 and 11,271.29

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Solution

The fourth proportional to 20,702.79, 28,569.65 and 11,271.29 is: 15,554.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.79 : 28,569.65 = 11,271.29 : x
  2. Step 2: Convert to fraction form
    20,702.79/28,569.65 = 11,271.29/x
  3. Step 3: Cross multiply
    20,702.79x = 28,569.65 × 11,271.29
  4. Step 4: Simplify right side
    20,702.79x = 322,016,611.14
  5. Step 5: Solve for x
    x = 322,016,611.14/20,702.79
  6. Step 6: Final answer
    x = 15,554.26

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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.