Home / 20,577.76-28,386.96-13,503.20

Finding the Fourth Proportional to 20,577.76, 28,386.96 and 13,503.20

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Solution

The fourth proportional to 20,577.76, 28,386.96 and 13,503.20 is: 18,627.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,577.76 : 28,386.96 = 13,503.20 : x
  2. Step 2: Convert to fraction form
    20,577.76/28,386.96 = 13,503.20/x
  3. Step 3: Cross multiply
    20,577.76x = 28,386.96 × 13,503.20
  4. Step 4: Simplify right side
    20,577.76x = 383,314,798.27
  5. Step 5: Solve for x
    x = 383,314,798.27/20,577.76
  6. Step 6: Final answer
    x = 18,627.63

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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.