Home / 15,678.69-21,636.59-9,391.07

Finding the Fourth Proportional to 15,678.69, 21,636.59 and 9,391.07

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Solution

The fourth proportional to 15,678.69, 21,636.59 and 9,391.07 is: 12,959.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.69 : 21,636.59 = 9,391.07 : x
  2. Step 2: Convert to fraction form
    15,678.69/21,636.59 = 9,391.07/x
  3. Step 3: Cross multiply
    15,678.69x = 21,636.59 × 9,391.07
  4. Step 4: Simplify right side
    15,678.69x = 203,190,623.07
  5. Step 5: Solve for x
    x = 203,190,623.07/15,678.69
  6. Step 6: Final answer
    x = 12,959.67

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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.