Home / 15,678.96-21,636.88-8,605.33

Finding the Fourth Proportional to 15,678.96, 21,636.88 and 8,605.33

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Solution

The fourth proportional to 15,678.96, 21,636.88 and 8,605.33 is: 11,875.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.96 : 21,636.88 = 8,605.33 : x
  2. Step 2: Convert to fraction form
    15,678.96/21,636.88 = 8,605.33/x
  3. Step 3: Cross multiply
    15,678.96x = 21,636.88 × 8,605.33
  4. Step 4: Simplify right side
    15,678.96x = 186,192,492.57
  5. Step 5: Solve for x
    x = 186,192,492.57/15,678.96
  6. Step 6: Final answer
    x = 11,875.31

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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.