Home / 15,686.19-21,647.40-8,613.06

Finding the Fourth Proportional to 15,686.19, 21,647.40 and 8,613.06

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Solution

The fourth proportional to 15,686.19, 21,647.40 and 8,613.06 is: 11,886.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.19 : 21,647.40 = 8,613.06 : x
  2. Step 2: Convert to fraction form
    15,686.19/21,647.40 = 8,613.06/x
  3. Step 3: Cross multiply
    15,686.19x = 21,647.40 × 8,613.06
  4. Step 4: Simplify right side
    15,686.19x = 186,450,355.04
  5. Step 5: Solve for x
    x = 186,450,355.04/15,686.19
  6. Step 6: Final answer
    x = 11,886.27

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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.