Home / 12,487.16-18,742.26-8,740.28

Finding the Fourth Proportional to 12,487.16, 18,742.26 and 8,740.28

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Solution

The fourth proportional to 12,487.16, 18,742.26 and 8,740.28 is: 13,118.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.16 : 18,742.26 = 8,740.28 : x
  2. Step 2: Convert to fraction form
    12,487.16/18,742.26 = 8,740.28/x
  3. Step 3: Cross multiply
    12,487.16x = 18,742.26 × 8,740.28
  4. Step 4: Simplify right side
    12,487.16x = 163,812,600.23
  5. Step 5: Solve for x
    x = 163,812,600.23/12,487.16
  6. Step 6: Final answer
    x = 13,118.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.