Home / 13,618.28-20,332.10-12,783.98

Finding the Fourth Proportional to 13,618.28, 20,332.10 and 12,783.98

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Solution

The fourth proportional to 13,618.28, 20,332.10 and 12,783.98 is: 19,086.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,618.28 : 20,332.10 = 12,783.98 : x
  2. Step 2: Convert to fraction form
    13,618.28/20,332.10 = 12,783.98/x
  3. Step 3: Cross multiply
    13,618.28x = 20,332.10 × 12,783.98
  4. Step 4: Simplify right side
    13,618.28x = 259,925,159.76
  5. Step 5: Solve for x
    x = 259,925,159.76/13,618.28
  6. Step 6: Final answer
    x = 19,086.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.