Home / 12,742.10-17,587.78-7,706.34

Finding the Fourth Proportional to 12,742.10, 17,587.78 and 7,706.34

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Solution

The fourth proportional to 12,742.10, 17,587.78 and 7,706.34 is: 10,636.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,742.10 : 17,587.78 = 7,706.34 : x
  2. Step 2: Convert to fraction form
    12,742.10/17,587.78 = 7,706.34/x
  3. Step 3: Cross multiply
    12,742.10x = 17,587.78 × 7,706.34
  4. Step 4: Simplify right side
    12,742.10x = 135,537,412.53
  5. Step 5: Solve for x
    x = 135,537,412.53/12,742.10
  6. Step 6: Final answer
    x = 10,636.98

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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.