Home / 19,320.16-26,649.12-15,121.12

Finding the Fourth Proportional to 19,320.16, 26,649.12 and 15,121.12

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Solution

The fourth proportional to 19,320.16, 26,649.12 and 15,121.12 is: 20,857.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,320.16 : 26,649.12 = 15,121.12 : x
  2. Step 2: Convert to fraction form
    19,320.16/26,649.12 = 15,121.12/x
  3. Step 3: Cross multiply
    19,320.16x = 26,649.12 × 15,121.12
  4. Step 4: Simplify right side
    19,320.16x = 402,964,541.41
  5. Step 5: Solve for x
    x = 402,964,541.41/19,320.16
  6. Step 6: Final answer
    x = 20,857.21

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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.