Home / 21,213.99-29,275.47-13,260.90

Finding the Fourth Proportional to 21,213.99, 29,275.47 and 13,260.90

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Solution

The fourth proportional to 21,213.99, 29,275.47 and 13,260.90 is: 18,300.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.99 : 29,275.47 = 13,260.90 : x
  2. Step 2: Convert to fraction form
    21,213.99/29,275.47 = 13,260.90/x
  3. Step 3: Cross multiply
    21,213.99x = 29,275.47 × 13,260.90
  4. Step 4: Simplify right side
    21,213.99x = 388,219,080.12
  5. Step 5: Solve for x
    x = 388,219,080.12/21,213.99
  6. Step 6: Final answer
    x = 18,300.14

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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.