Home / 15,693.63-21,656.40-8,618.69

Finding the Fourth Proportional to 15,693.63, 21,656.40 and 8,618.69

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Solution

The fourth proportional to 15,693.63, 21,656.40 and 8,618.69 is: 11,893.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,693.63 : 21,656.40 = 8,618.69 : x
  2. Step 2: Convert to fraction form
    15,693.63/21,656.40 = 8,618.69/x
  3. Step 3: Cross multiply
    15,693.63x = 21,656.40 × 8,618.69
  4. Step 4: Simplify right side
    15,693.63x = 186,649,689.83
  5. Step 5: Solve for x
    x = 186,649,689.83/15,693.63
  6. Step 6: Final answer
    x = 11,893.34

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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.