Home / 18,660.51-25,707.68-12,985.52

Finding the Fourth Proportional to 18,660.51, 25,707.68 and 12,985.52

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Solution

The fourth proportional to 18,660.51, 25,707.68 and 12,985.52 is: 17,889.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660.51 : 25,707.68 = 12,985.52 : x
  2. Step 2: Convert to fraction form
    18,660.51/25,707.68 = 12,985.52/x
  3. Step 3: Cross multiply
    18,660.51x = 25,707.68 × 12,985.52
  4. Step 4: Simplify right side
    18,660.51x = 333,827,448.02
  5. Step 5: Solve for x
    x = 333,827,448.02/18,660.51
  6. Step 6: Final answer
    x = 17,889.51

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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.