Home / 28,215.36-38,919.48-18,156.86

Finding the Fourth Proportional to 28,215.36, 38,919.48 and 18,156.86

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Solution

The fourth proportional to 28,215.36, 38,919.48 and 18,156.86 is: 25,045.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.36 : 38,919.48 = 18,156.86 : x
  2. Step 2: Convert to fraction form
    28,215.36/38,919.48 = 18,156.86/x
  3. Step 3: Cross multiply
    28,215.36x = 38,919.48 × 18,156.86
  4. Step 4: Simplify right side
    28,215.36x = 706,655,549.63
  5. Step 5: Solve for x
    x = 706,655,549.63/28,215.36
  6. Step 6: Final answer
    x = 25,045.07

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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.