Home / 21,225.23-29,281.73-13,253.61

Finding the Fourth Proportional to 21,225.23, 29,281.73 and 13,253.61

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Solution

The fourth proportional to 21,225.23, 29,281.73 and 13,253.61 is: 18,284.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225.23 : 29,281.73 = 13,253.61 : x
  2. Step 2: Convert to fraction form
    21,225.23/29,281.73 = 13,253.61/x
  3. Step 3: Cross multiply
    21,225.23x = 29,281.73 × 13,253.61
  4. Step 4: Simplify right side
    21,225.23x = 388,088,563.28
  5. Step 5: Solve for x
    x = 388,088,563.28/21,225.23
  6. Step 6: Final answer
    x = 18,284.31

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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.