Home / 20,985.99-28,960.06-11,426.07

Finding the Fourth Proportional to 20,985.99, 28,960.06 and 11,426.07

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Solution

The fourth proportional to 20,985.99, 28,960.06 and 11,426.07 is: 15,767.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.99 : 28,960.06 = 11,426.07 : x
  2. Step 2: Convert to fraction form
    20,985.99/28,960.06 = 11,426.07/x
  3. Step 3: Cross multiply
    20,985.99x = 28,960.06 × 11,426.07
  4. Step 4: Simplify right side
    20,985.99x = 330,899,615.63
  5. Step 5: Solve for x
    x = 330,899,615.63/20,985.99
  6. Step 6: Final answer
    x = 15,767.64

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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.