Home / 21,000.51-28,981.26-11,569.68

Finding the Fourth Proportional to 21,000.51, 28,981.26 and 11,569.68

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Solution

The fourth proportional to 21,000.51, 28,981.26 and 11,569.68 is: 15,966.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.51 : 28,981.26 = 11,569.68 : x
  2. Step 2: Convert to fraction form
    21,000.51/28,981.26 = 11,569.68/x
  3. Step 3: Cross multiply
    21,000.51x = 28,981.26 × 11,569.68
  4. Step 4: Simplify right side
    21,000.51x = 335,303,904.20
  5. Step 5: Solve for x
    x = 335,303,904.20/21,000.51
  6. Step 6: Final answer
    x = 15,966.46

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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.