Home / 21,000.51-28,980.72-11,569.07

Finding the Fourth Proportional to 21,000.51, 28,980.72 and 11,569.07

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Solution

The fourth proportional to 21,000.51, 28,980.72 and 11,569.07 is: 15,965.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.51 : 28,980.72 = 11,569.07 : x
  2. Step 2: Convert to fraction form
    21,000.51/28,980.72 = 11,569.07/x
  3. Step 3: Cross multiply
    21,000.51x = 28,980.72 × 11,569.07
  4. Step 4: Simplify right side
    21,000.51x = 335,280,050.78
  5. Step 5: Solve for x
    x = 335,280,050.78/21,000.51
  6. Step 6: Final answer
    x = 15,965.33

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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.