Home / 15,389.24-21,235.87-8,676.51

Finding the Fourth Proportional to 15,389.24, 21,235.87 and 8,676.51

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Solution

The fourth proportional to 15,389.24, 21,235.87 and 8,676.51 is: 11,972.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.24 : 21,235.87 = 8,676.51 : x
  2. Step 2: Convert to fraction form
    15,389.24/21,235.87 = 8,676.51/x
  3. Step 3: Cross multiply
    15,389.24x = 21,235.87 × 8,676.51
  4. Step 4: Simplify right side
    15,389.24x = 184,253,264.67
  5. Step 5: Solve for x
    x = 184,253,264.67/15,389.24
  6. Step 6: Final answer
    x = 11,972.87

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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.