Home / 14,975.64-20,661.84-8,686.80

Finding the Fourth Proportional to 14,975.64, 20,661.84 and 8,686.80

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Solution

The fourth proportional to 14,975.64, 20,661.84 and 8,686.80 is: 11,985.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,975.64 : 20,661.84 = 8,686.80 : x
  2. Step 2: Convert to fraction form
    14,975.64/20,661.84 = 8,686.80/x
  3. Step 3: Cross multiply
    14,975.64x = 20,661.84 × 8,686.80
  4. Step 4: Simplify right side
    14,975.64x = 179,485,271.71
  5. Step 5: Solve for x
    x = 179,485,271.71/14,975.64
  6. Step 6: Final answer
    x = 11,985.15

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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.