Home / 21,225.18-29,263.74-13,264.50

Finding the Fourth Proportional to 21,225.18, 29,263.74 and 13,264.50

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Solution

The fourth proportional to 21,225.18, 29,263.74 and 13,264.50 is: 18,288.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225.18 : 29,263.74 = 13,264.50 : x
  2. Step 2: Convert to fraction form
    21,225.18/29,263.74 = 13,264.50/x
  3. Step 3: Cross multiply
    21,225.18x = 29,263.74 × 13,264.50
  4. Step 4: Simplify right side
    21,225.18x = 388,168,879.23
  5. Step 5: Solve for x
    x = 388,168,879.23/21,225.18
  6. Step 6: Final answer
    x = 18,288.13

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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.