Home / 20,782.47-28,690.16-12,829.08

Finding the Fourth Proportional to 20,782.47, 28,690.16 and 12,829.08

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Solution

The fourth proportional to 20,782.47, 28,690.16 and 12,829.08 is: 17,710.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.47 : 28,690.16 = 12,829.08 : x
  2. Step 2: Convert to fraction form
    20,782.47/28,690.16 = 12,829.08/x
  3. Step 3: Cross multiply
    20,782.47x = 28,690.16 × 12,829.08
  4. Step 4: Simplify right side
    20,782.47x = 368,068,293.71
  5. Step 5: Solve for x
    x = 368,068,293.71/20,782.47
  6. Step 6: Final answer
    x = 17,710.52

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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.