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Finding the Fourth Proportional to 15,657.58, 21,608.14 and 9,368.74

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Solution

The fourth proportional to 15,657.58, 21,608.14 and 9,368.74 is: 12,929.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,657.58 : 21,608.14 = 9,368.74 : x
  2. Step 2: Convert to fraction form
    15,657.58/21,608.14 = 9,368.74/x
  3. Step 3: Cross multiply
    15,657.58x = 21,608.14 × 9,368.74
  4. Step 4: Simplify right side
    15,657.58x = 202,441,045.54
  5. Step 5: Solve for x
    x = 202,441,045.54/15,657.58
  6. Step 6: Final answer
    x = 12,929.27

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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.