Home / 20,702.39-31,028.67-7,547.58

Finding the Fourth Proportional to 20,702.39, 31,028.67 and 7,547.58

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Solution

The fourth proportional to 20,702.39, 31,028.67 and 7,547.58 is: 11,312.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.39 : 31,028.67 = 7,547.58 : x
  2. Step 2: Convert to fraction form
    20,702.39/31,028.67 = 7,547.58/x
  3. Step 3: Cross multiply
    20,702.39x = 31,028.67 × 7,547.58
  4. Step 4: Simplify right side
    20,702.39x = 234,191,369.12
  5. Step 5: Solve for x
    x = 234,191,369.12/20,702.39
  6. Step 6: Final answer
    x = 11,312.29

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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.