Home / 20,298.78-28,006.74-11,345.28

Finding the Fourth Proportional to 20,298.78, 28,006.74 and 11,345.28

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Solution

The fourth proportional to 20,298.78, 28,006.74 and 11,345.28 is: 15,653.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,298.78 : 28,006.74 = 11,345.28 : x
  2. Step 2: Convert to fraction form
    20,298.78/28,006.74 = 11,345.28/x
  3. Step 3: Cross multiply
    20,298.78x = 28,006.74 × 11,345.28
  4. Step 4: Simplify right side
    20,298.78x = 317,744,307.19
  5. Step 5: Solve for x
    x = 317,744,307.19/20,298.78
  6. Step 6: Final answer
    x = 15,653.37

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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.