Home / 21,254.79-29,339.51-18,258.60

Finding the Fourth Proportional to 21,254.79, 29,339.51 and 18,258.60

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Solution

The fourth proportional to 21,254.79, 29,339.51 and 18,258.60 is: 25,203.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,254.79 : 29,339.51 = 18,258.60 : x
  2. Step 2: Convert to fraction form
    21,254.79/29,339.51 = 18,258.60/x
  3. Step 3: Cross multiply
    21,254.79x = 29,339.51 × 18,258.60
  4. Step 4: Simplify right side
    21,254.79x = 535,698,285.99
  5. Step 5: Solve for x
    x = 535,698,285.99/21,254.79
  6. Step 6: Final answer
    x = 25,203.65

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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.