Home / 13,688.58-18,898.38-8,981.08

Finding the Fourth Proportional to 13,688.58, 18,898.38 and 8,981.08

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Solution

The fourth proportional to 13,688.58, 18,898.38 and 8,981.08 is: 12,399.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.58 : 18,898.38 = 8,981.08 : x
  2. Step 2: Convert to fraction form
    13,688.58/18,898.38 = 8,981.08/x
  3. Step 3: Cross multiply
    13,688.58x = 18,898.38 × 8,981.08
  4. Step 4: Simplify right side
    13,688.58x = 169,727,862.65
  5. Step 5: Solve for x
    x = 169,727,862.65/13,688.58
  6. Step 6: Final answer
    x = 12,399.23

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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.