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Finding the Fourth Proportional to 15,780.84, 23,630.88 and 15,313.68

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Solution

The fourth proportional to 15,780.84, 23,630.88 and 15,313.68 is: 22,931.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780.84 : 23,630.88 = 15,313.68 : x
  2. Step 2: Convert to fraction form
    15,780.84/23,630.88 = 15,313.68/x
  3. Step 3: Cross multiply
    15,780.84x = 23,630.88 × 15,313.68
  4. Step 4: Simplify right side
    15,780.84x = 361,875,734.44
  5. Step 5: Solve for x
    x = 361,875,734.44/15,780.84
  6. Step 6: Final answer
    x = 22,931.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.