Home / 28,018.94-38,666.13-15,443.90

Finding the Fourth Proportional to 28,018.94, 38,666.13 and 15,443.90

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Solution

The fourth proportional to 28,018.94, 38,666.13 and 15,443.90 is: 21,312.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,018.94 : 38,666.13 = 15,443.90 : x
  2. Step 2: Convert to fraction form
    28,018.94/38,666.13 = 15,443.90/x
  3. Step 3: Cross multiply
    28,018.94x = 38,666.13 × 15,443.90
  4. Step 4: Simplify right side
    28,018.94x = 597,155,845.11
  5. Step 5: Solve for x
    x = 597,155,845.11/28,018.94
  6. Step 6: Final answer
    x = 21,312.58

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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.