Home / 20,386.17-28,128.42-19,714.19

Finding the Fourth Proportional to 20,386.17, 28,128.42 and 19,714.19

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Solution

The fourth proportional to 20,386.17, 28,128.42 and 19,714.19 is: 27,201.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.17 : 28,128.42 = 19,714.19 : x
  2. Step 2: Convert to fraction form
    20,386.17/28,128.42 = 19,714.19/x
  3. Step 3: Cross multiply
    20,386.17x = 28,128.42 × 19,714.19
  4. Step 4: Simplify right side
    20,386.17x = 554,528,875.64
  5. Step 5: Solve for x
    x = 554,528,875.64/20,386.17
  6. Step 6: Final answer
    x = 27,201.23

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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.