Home / 21,320.88-31,979.96-6,528.40

Finding the Fourth Proportional to 21,320.88, 31,979.96 and 6,528.40

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Solution

The fourth proportional to 21,320.88, 31,979.96 and 6,528.40 is: 9,792.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.88 : 31,979.96 = 6,528.40 : x
  2. Step 2: Convert to fraction form
    21,320.88/31,979.96 = 6,528.40/x
  3. Step 3: Cross multiply
    21,320.88x = 31,979.96 × 6,528.40
  4. Step 4: Simplify right side
    21,320.88x = 208,777,970.86
  5. Step 5: Solve for x
    x = 208,777,970.86/21,320.88
  6. Step 6: Final answer
    x = 9,792.18

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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.