Home / 15,457.16-21,321.78-10,678.28

Finding the Fourth Proportional to 15,457.16, 21,321.78 and 10,678.28

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Solution

The fourth proportional to 15,457.16, 21,321.78 and 10,678.28 is: 14,729.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,457.16 : 21,321.78 = 10,678.28 : x
  2. Step 2: Convert to fraction form
    15,457.16/21,321.78 = 10,678.28/x
  3. Step 3: Cross multiply
    15,457.16x = 21,321.78 × 10,678.28
  4. Step 4: Simplify right side
    15,457.16x = 227,679,936.94
  5. Step 5: Solve for x
    x = 227,679,936.94/15,457.16
  6. Step 6: Final answer
    x = 14,729.74

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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.