Home / 15,681.96-21,629.70-10,381.32

Finding the Fourth Proportional to 15,681.96, 21,629.70 and 10,381.32

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Solution

The fourth proportional to 15,681.96, 21,629.70 and 10,381.32 is: 14,318.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,681.96 : 21,629.70 = 10,381.32 : x
  2. Step 2: Convert to fraction form
    15,681.96/21,629.70 = 10,381.32/x
  3. Step 3: Cross multiply
    15,681.96x = 21,629.70 × 10,381.32
  4. Step 4: Simplify right side
    15,681.96x = 224,544,837.20
  5. Step 5: Solve for x
    x = 224,544,837.20/15,681.96
  6. Step 6: Final answer
    x = 14,318.67

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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.