Home / 13,421.08-18,529.86-8,718.76

Finding the Fourth Proportional to 13,421.08, 18,529.86 and 8,718.76

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Solution

The fourth proportional to 13,421.08, 18,529.86 and 8,718.76 is: 12,037.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.08 : 18,529.86 = 8,718.76 : x
  2. Step 2: Convert to fraction form
    13,421.08/18,529.86 = 8,718.76/x
  3. Step 3: Cross multiply
    13,421.08x = 18,529.86 × 8,718.76
  4. Step 4: Simplify right side
    13,421.08x = 161,557,402.17
  5. Step 5: Solve for x
    x = 161,557,402.17/13,421.08
  6. Step 6: Final answer
    x = 12,037.59

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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.