Home / 20,903.64-28,837.86-12,515.28

Finding the Fourth Proportional to 20,903.64, 28,837.86 and 12,515.28

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Solution

The fourth proportional to 20,903.64, 28,837.86 and 12,515.28 is: 17,265.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.64 : 28,837.86 = 12,515.28 : x
  2. Step 2: Convert to fraction form
    20,903.64/28,837.86 = 12,515.28/x
  3. Step 3: Cross multiply
    20,903.64x = 28,837.86 × 12,515.28
  4. Step 4: Simplify right side
    20,903.64x = 360,913,892.50
  5. Step 5: Solve for x
    x = 360,913,892.50/20,903.64
  6. Step 6: Final answer
    x = 17,265.60

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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.