Home / 28,018.86-38,666.21-15,443.61

Finding the Fourth Proportional to 28,018.86, 38,666.21 and 15,443.61

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Solution

The fourth proportional to 28,018.86, 38,666.21 and 15,443.61 is: 21,312.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,018.86 : 38,666.21 = 15,443.61 : x
  2. Step 2: Convert to fraction form
    28,018.86/38,666.21 = 15,443.61/x
  3. Step 3: Cross multiply
    28,018.86x = 38,666.21 × 15,443.61
  4. Step 4: Simplify right side
    28,018.86x = 597,145,867.42
  5. Step 5: Solve for x
    x = 597,145,867.42/28,018.86
  6. Step 6: Final answer
    x = 21,312.28

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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.