Home / 10,876.50-15,018.21-8,530.74

Finding the Fourth Proportional to 10,876.50, 15,018.21 and 8,530.74

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Solution

The fourth proportional to 10,876.50, 15,018.21 and 8,530.74 is: 11,779.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,876.50 : 15,018.21 = 8,530.74 : x
  2. Step 2: Convert to fraction form
    10,876.50/15,018.21 = 8,530.74/x
  3. Step 3: Cross multiply
    10,876.50x = 15,018.21 × 8,530.74
  4. Step 4: Simplify right side
    10,876.50x = 128,116,444.78
  5. Step 5: Solve for x
    x = 128,116,444.78/10,876.50
  6. Step 6: Final answer
    x = 11,779.20

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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.