Home / 13,389.12-18,479.16-12,798.54

Finding the Fourth Proportional to 13,389.12, 18,479.16 and 12,798.54

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Solution

The fourth proportional to 13,389.12, 18,479.16 and 12,798.54 is: 17,664.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.12 : 18,479.16 = 12,798.54 : x
  2. Step 2: Convert to fraction form
    13,389.12/18,479.16 = 12,798.54/x
  3. Step 3: Cross multiply
    13,389.12x = 18,479.16 × 12,798.54
  4. Step 4: Simplify right side
    13,389.12x = 236,506,268.43
  5. Step 5: Solve for x
    x = 236,506,268.43/13,389.12
  6. Step 6: Final answer
    x = 17,664.06

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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.