Home / 15,742.72-21,718.32-10,428.31

Finding the Fourth Proportional to 15,742.72, 21,718.32 and 10,428.31

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Solution

The fourth proportional to 15,742.72, 21,718.32 and 10,428.31 is: 14,386.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.72 : 21,718.32 = 10,428.31 : x
  2. Step 2: Convert to fraction form
    15,742.72/21,718.32 = 10,428.31/x
  3. Step 3: Cross multiply
    15,742.72x = 21,718.32 × 10,428.31
  4. Step 4: Simplify right side
    15,742.72x = 226,485,373.64
  5. Step 5: Solve for x
    x = 226,485,373.64/15,742.72
  6. Step 6: Final answer
    x = 14,386.67

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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.