Home / 21,320.47-31,980.84-6,528.25

Finding the Fourth Proportional to 21,320.47, 31,980.84 and 6,528.25

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Solution

The fourth proportional to 21,320.47, 31,980.84 and 6,528.25 is: 9,792.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.47 : 31,980.84 = 6,528.25 : x
  2. Step 2: Convert to fraction form
    21,320.47/31,980.84 = 6,528.25/x
  3. Step 3: Cross multiply
    21,320.47x = 31,980.84 × 6,528.25
  4. Step 4: Simplify right side
    21,320.47x = 208,778,918.73
  5. Step 5: Solve for x
    x = 208,778,918.73/21,320.47
  6. Step 6: Final answer
    x = 9,792.42

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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.