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Finding the Fourth Proportional to 15,653.39, 21,602.10 and 8,580.08

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Solution

The fourth proportional to 15,653.39, 21,602.10 and 8,580.08 is: 11,840.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,653.39 : 21,602.10 = 8,580.08 : x
  2. Step 2: Convert to fraction form
    15,653.39/21,602.10 = 8,580.08/x
  3. Step 3: Cross multiply
    15,653.39x = 21,602.10 × 8,580.08
  4. Step 4: Simplify right side
    15,653.39x = 185,347,746.17
  5. Step 5: Solve for x
    x = 185,347,746.17/15,653.39
  6. Step 6: Final answer
    x = 11,840.74

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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.