Home / 20,271.94-27,988.08-13,909.18

Finding the Fourth Proportional to 20,271.94, 27,988.08 and 13,909.18

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Solution

The fourth proportional to 20,271.94, 27,988.08 and 13,909.18 is: 19,203.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.94 : 27,988.08 = 13,909.18 : x
  2. Step 2: Convert to fraction form
    20,271.94/27,988.08 = 13,909.18/x
  3. Step 3: Cross multiply
    20,271.94x = 27,988.08 × 13,909.18
  4. Step 4: Simplify right side
    20,271.94x = 389,291,242.57
  5. Step 5: Solve for x
    x = 389,291,242.57/20,271.94
  6. Step 6: Final answer
    x = 19,203.45

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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.