Home / 20,686.08-28,551.40-12,621.52

Finding the Fourth Proportional to 20,686.08, 28,551.40 and 12,621.52

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Solution

The fourth proportional to 20,686.08, 28,551.40 and 12,621.52 is: 17,420.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.08 : 28,551.40 = 12,621.52 : x
  2. Step 2: Convert to fraction form
    20,686.08/28,551.40 = 12,621.52/x
  3. Step 3: Cross multiply
    20,686.08x = 28,551.40 × 12,621.52
  4. Step 4: Simplify right side
    20,686.08x = 360,362,066.13
  5. Step 5: Solve for x
    x = 360,362,066.13/20,686.08
  6. Step 6: Final answer
    x = 17,420.51

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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.