Home / 13,400.08-18,492.84-8,688.40

Finding the Fourth Proportional to 13,400.08, 18,492.84 and 8,688.40

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Solution

The fourth proportional to 13,400.08, 18,492.84 and 8,688.40 is: 11,990.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,400.08 : 18,492.84 = 8,688.40 : x
  2. Step 2: Convert to fraction form
    13,400.08/18,492.84 = 8,688.40/x
  3. Step 3: Cross multiply
    13,400.08x = 18,492.84 × 8,688.40
  4. Step 4: Simplify right side
    13,400.08x = 160,673,191.06
  5. Step 5: Solve for x
    x = 160,673,191.06/13,400.08
  6. Step 6: Final answer
    x = 11,990.47

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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.