Home / 21,325.97-29,420.31-12,368.28

Finding the Fourth Proportional to 21,325.97, 29,420.31 and 12,368.28

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Solution

The fourth proportional to 21,325.97, 29,420.31 and 12,368.28 is: 17,062.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,325.97 : 29,420.31 = 12,368.28 : x
  2. Step 2: Convert to fraction form
    21,325.97/29,420.31 = 12,368.28/x
  3. Step 3: Cross multiply
    21,325.97x = 29,420.31 × 12,368.28
  4. Step 4: Simplify right side
    21,325.97x = 363,878,631.77
  5. Step 5: Solve for x
    x = 363,878,631.77/21,325.97
  6. Step 6: Final answer
    x = 17,062.70

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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.