Home / 21,271.20-29,346.36-21,238.40

Finding the Fourth Proportional to 21,271.20, 29,346.36 and 21,238.40

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Solution

The fourth proportional to 21,271.20, 29,346.36 and 21,238.40 is: 29,301.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.20 : 29,346.36 = 21,238.40 : x
  2. Step 2: Convert to fraction form
    21,271.20/29,346.36 = 21,238.40/x
  3. Step 3: Cross multiply
    21,271.20x = 29,346.36 × 21,238.40
  4. Step 4: Simplify right side
    21,271.20x = 623,269,585.49
  5. Step 5: Solve for x
    x = 623,269,585.49/21,271.20
  6. Step 6: Final answer
    x = 29,301.10

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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.