Home / 28,143.09-38,835.87-15,393.72

Finding the Fourth Proportional to 28,143.09, 38,835.87 and 15,393.72

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Solution

The fourth proportional to 28,143.09, 38,835.87 and 15,393.72 is: 21,242.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.09 : 38,835.87 = 15,393.72 : x
  2. Step 2: Convert to fraction form
    28,143.09/38,835.87 = 15,393.72/x
  3. Step 3: Cross multiply
    28,143.09x = 38,835.87 × 15,393.72
  4. Step 4: Simplify right side
    28,143.09x = 597,828,508.74
  5. Step 5: Solve for x
    x = 597,828,508.74/28,143.09
  6. Step 6: Final answer
    x = 21,242.46

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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.