Home / 15,681.61-21,640.78-8,511.58

Finding the Fourth Proportional to 15,681.61, 21,640.78 and 8,511.58

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Solution

The fourth proportional to 15,681.61, 21,640.78 and 8,511.58 is: 11,746.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,681.61 : 21,640.78 = 8,511.58 : x
  2. Step 2: Convert to fraction form
    15,681.61/21,640.78 = 8,511.58/x
  3. Step 3: Cross multiply
    15,681.61x = 21,640.78 × 8,511.58
  4. Step 4: Simplify right side
    15,681.61x = 184,197,187.67
  5. Step 5: Solve for x
    x = 184,197,187.67/15,681.61
  6. Step 6: Final answer
    x = 11,746.07

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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.