Home / 13,278.60-18,267.78-12,909.51

Finding the Fourth Proportional to 13,278.60, 18,267.78 and 12,909.51

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Solution

The fourth proportional to 13,278.60, 18,267.78 and 12,909.51 is: 17,760.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.60 : 18,267.78 = 12,909.51 : x
  2. Step 2: Convert to fraction form
    13,278.60/18,267.78 = 12,909.51/x
  3. Step 3: Cross multiply
    13,278.60x = 18,267.78 × 12,909.51
  4. Step 4: Simplify right side
    13,278.60x = 235,828,088.59
  5. Step 5: Solve for x
    x = 235,828,088.59/13,278.60
  6. Step 6: Final answer
    x = 17,760.01

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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.