Home / 20,750.51-28,636.40-11,319.59

Finding the Fourth Proportional to 20,750.51, 28,636.40 and 11,319.59

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Solution

The fourth proportional to 20,750.51, 28,636.40 and 11,319.59 is: 15,621.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.51 : 28,636.40 = 11,319.59 : x
  2. Step 2: Convert to fraction form
    20,750.51/28,636.40 = 11,319.59/x
  3. Step 3: Cross multiply
    20,750.51x = 28,636.40 × 11,319.59
  4. Step 4: Simplify right side
    20,750.51x = 324,152,250.48
  5. Step 5: Solve for x
    x = 324,152,250.48/20,750.51
  6. Step 6: Final answer
    x = 15,621.41

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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.