Home / 21,000.99-28,981.38-11,569.56

Finding the Fourth Proportional to 21,000.99, 28,981.38 and 11,569.56

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Solution

The fourth proportional to 21,000.99, 28,981.38 and 11,569.56 is: 15,966.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.99 : 28,981.38 = 11,569.56 : x
  2. Step 2: Convert to fraction form
    21,000.99/28,981.38 = 11,569.56/x
  3. Step 3: Cross multiply
    21,000.99x = 28,981.38 × 11,569.56
  4. Step 4: Simplify right side
    21,000.99x = 335,301,814.79
  5. Step 5: Solve for x
    x = 335,301,814.79/21,000.99
  6. Step 6: Final answer
    x = 15,966.00

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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.