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Finding the Fourth Proportional to 13,416.48, 18,518.40 and 8,700.48

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Solution

The fourth proportional to 13,416.48, 18,518.40 and 8,700.48 is: 12,009.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,416.48 : 18,518.40 = 8,700.48 : x
  2. Step 2: Convert to fraction form
    13,416.48/18,518.40 = 8,700.48/x
  3. Step 3: Cross multiply
    13,416.48x = 18,518.40 × 8,700.48
  4. Step 4: Simplify right side
    13,416.48x = 161,118,968.83
  5. Step 5: Solve for x
    x = 161,118,968.83/13,416.48
  6. Step 6: Final answer
    x = 12,009.03

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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.