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Finding the Fourth Proportional to 15,440.76, 21,307.86 and 9,153

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Solution

The fourth proportional to 15,440.76, 21,307.86 and 9,153 is: 12,630.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,440.76 : 21,307.86 = 9,153 : x
  2. Step 2: Convert to fraction form
    15,440.76/21,307.86 = 9,153/x
  3. Step 3: Cross multiply
    15,440.76x = 21,307.86 × 9,153
  4. Step 4: Simplify right side
    15,440.76x = 195,030,842.58
  5. Step 5: Solve for x
    x = 195,030,842.58/15,440.76
  6. Step 6: Final answer
    x = 12,630.91

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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.