Home / 20,347.08-28,077.36-11,392.50

Finding the Fourth Proportional to 20,347.08, 28,077.36 and 11,392.50

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Solution

The fourth proportional to 20,347.08, 28,077.36 and 11,392.50 is: 15,720.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,347.08 : 28,077.36 = 11,392.50 : x
  2. Step 2: Convert to fraction form
    20,347.08/28,077.36 = 11,392.50/x
  3. Step 3: Cross multiply
    20,347.08x = 28,077.36 × 11,392.50
  4. Step 4: Simplify right side
    20,347.08x = 319,871,323.80
  5. Step 5: Solve for x
    x = 319,871,323.80/20,347.08
  6. Step 6: Final answer
    x = 15,720.75

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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.