Home / 13,695.12-18,899.28-8,661.51

Finding the Fourth Proportional to 13,695.12, 18,899.28 and 8,661.51

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Solution

The fourth proportional to 13,695.12, 18,899.28 and 8,661.51 is: 11,952.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,695.12 : 18,899.28 = 8,661.51 : x
  2. Step 2: Convert to fraction form
    13,695.12/18,899.28 = 8,661.51/x
  3. Step 3: Cross multiply
    13,695.12x = 18,899.28 × 8,661.51
  4. Step 4: Simplify right side
    13,695.12x = 163,696,302.71
  5. Step 5: Solve for x
    x = 163,696,302.71/13,695.12
  6. Step 6: Final answer
    x = 11,952.89

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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.