Home / 28,103.68-38,782.74-15,528.16

Finding the Fourth Proportional to 28,103.68, 38,782.74 and 15,528.16

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Solution

The fourth proportional to 28,103.68, 38,782.74 and 15,528.16 is: 21,428.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,103.68 : 38,782.74 = 15,528.16 : x
  2. Step 2: Convert to fraction form
    28,103.68/38,782.74 = 15,528.16/x
  3. Step 3: Cross multiply
    28,103.68x = 38,782.74 × 15,528.16
  4. Step 4: Simplify right side
    28,103.68x = 602,224,591.96
  5. Step 5: Solve for x
    x = 602,224,591.96/28,103.68
  6. Step 6: Final answer
    x = 21,428.67

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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.