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Finding the Fourth Proportional to 18,980.64, 28,443.48 and 17,320.32

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Solution

The fourth proportional to 18,980.64, 28,443.48 and 17,320.32 is: 25,955.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.64 : 28,443.48 = 17,320.32 : x
  2. Step 2: Convert to fraction form
    18,980.64/28,443.48 = 17,320.32/x
  3. Step 3: Cross multiply
    18,980.64x = 28,443.48 × 17,320.32
  4. Step 4: Simplify right side
    18,980.64x = 492,650,175.51
  5. Step 5: Solve for x
    x = 492,650,175.51/18,980.64
  6. Step 6: Final answer
    x = 25,955.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.