Home / 21,187.48-29,226.57-13,215.87

Finding the Fourth Proportional to 21,187.48, 29,226.57 and 13,215.87

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Solution

The fourth proportional to 21,187.48, 29,226.57 and 13,215.87 is: 18,230.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.48 : 29,226.57 = 13,215.87 : x
  2. Step 2: Convert to fraction form
    21,187.48/29,226.57 = 13,215.87/x
  3. Step 3: Cross multiply
    21,187.48x = 29,226.57 × 13,215.87
  4. Step 4: Simplify right side
    21,187.48x = 386,254,549.67
  5. Step 5: Solve for x
    x = 386,254,549.67/21,187.48
  6. Step 6: Final answer
    x = 18,230.32

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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.