Home / 20,721.76-31,069.68-9,621.52

Finding the Fourth Proportional to 20,721.76, 31,069.68 and 9,621.52

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Solution

The fourth proportional to 20,721.76, 31,069.68 and 9,621.52 is: 14,426.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.76 : 31,069.68 = 9,621.52 : x
  2. Step 2: Convert to fraction form
    20,721.76/31,069.68 = 9,621.52/x
  3. Step 3: Cross multiply
    20,721.76x = 31,069.68 × 9,621.52
  4. Step 4: Simplify right side
    20,721.76x = 298,937,547.51
  5. Step 5: Solve for x
    x = 298,937,547.51/20,721.76
  6. Step 6: Final answer
    x = 14,426.26

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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.