Home / 28,126.91-38,814.71-15,380.13

Finding the Fourth Proportional to 28,126.91, 38,814.71 and 15,380.13

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Solution

The fourth proportional to 28,126.91, 38,814.71 and 15,380.13 is: 21,224.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,126.91 : 38,814.71 = 15,380.13 : x
  2. Step 2: Convert to fraction form
    28,126.91/38,814.71 = 15,380.13/x
  3. Step 3: Cross multiply
    28,126.91x = 38,814.71 × 15,380.13
  4. Step 4: Simplify right side
    28,126.91x = 596,975,208.81
  5. Step 5: Solve for x
    x = 596,975,208.81/28,126.91
  6. Step 6: Final answer
    x = 21,224.35

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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.