Home / 28,013.65-38,658.26-15,438.40

Finding the Fourth Proportional to 28,013.65, 38,658.26 and 15,438.40

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Solution

The fourth proportional to 28,013.65, 38,658.26 and 15,438.40 is: 21,304.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,013.65 : 38,658.26 = 15,438.40 : x
  2. Step 2: Convert to fraction form
    28,013.65/38,658.26 = 15,438.40/x
  3. Step 3: Cross multiply
    28,013.65x = 38,658.26 × 15,438.40
  4. Step 4: Simplify right side
    28,013.65x = 596,821,623.13
  5. Step 5: Solve for x
    x = 596,821,623.13/28,013.65
  6. Step 6: Final answer
    x = 21,304.67

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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.