Home / 15,643.13-21,587.51-8,569.40

Finding the Fourth Proportional to 15,643.13, 21,587.51 and 8,569.40

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Solution

The fourth proportional to 15,643.13, 21,587.51 and 8,569.40 is: 11,825.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,643.13 : 21,587.51 = 8,569.40 : x
  2. Step 2: Convert to fraction form
    15,643.13/21,587.51 = 8,569.40/x
  3. Step 3: Cross multiply
    15,643.13x = 21,587.51 × 8,569.40
  4. Step 4: Simplify right side
    15,643.13x = 184,991,921.68
  5. Step 5: Solve for x
    x = 184,991,921.68/15,643.13
  6. Step 6: Final answer
    x = 11,825.77

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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.