Home / 13,985.72-21,055.12-12,761.00

Finding the Fourth Proportional to 13,985.72, 21,055.12 and 12,761.00

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Solution

The fourth proportional to 13,985.72, 21,055.12 and 12,761.00 is: 19,211.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.72 : 21,055.12 = 12,761.00 : x
  2. Step 2: Convert to fraction form
    13,985.72/21,055.12 = 12,761.00/x
  3. Step 3: Cross multiply
    13,985.72x = 21,055.12 × 12,761.00
  4. Step 4: Simplify right side
    13,985.72x = 268,684,281.04
  5. Step 5: Solve for x
    x = 268,684,281.04/13,985.72
  6. Step 6: Final answer
    x = 19,211.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.