Home / 15,564.13-21,478.49-9,975.13

Finding the Fourth Proportional to 15,564.13, 21,478.49 and 9,975.13

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Solution

The fourth proportional to 15,564.13, 21,478.49 and 9,975.13 is: 13,765.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.13 : 21,478.49 = 9,975.13 : x
  2. Step 2: Convert to fraction form
    15,564.13/21,478.49 = 9,975.13/x
  3. Step 3: Cross multiply
    15,564.13x = 21,478.49 × 9,975.13
  4. Step 4: Simplify right side
    15,564.13x = 214,250,729.95
  5. Step 5: Solve for x
    x = 214,250,729.95/15,564.13
  6. Step 6: Final answer
    x = 13,765.67

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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.