Home / 15,486.77-21,370.65-8,587.87

Finding the Fourth Proportional to 15,486.77, 21,370.65 and 8,587.87

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Solution

The fourth proportional to 15,486.77, 21,370.65 and 8,587.87 is: 11,850.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.77 : 21,370.65 = 8,587.87 : x
  2. Step 2: Convert to fraction form
    15,486.77/21,370.65 = 8,587.87/x
  3. Step 3: Cross multiply
    15,486.77x = 21,370.65 × 8,587.87
  4. Step 4: Simplify right side
    15,486.77x = 183,528,364.02
  5. Step 5: Solve for x
    x = 183,528,364.02/15,486.77
  6. Step 6: Final answer
    x = 11,850.65

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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.