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Finding the Fourth Proportional to 18,302.10, 25,256.90 and 9,918.60

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Solution

The fourth proportional to 18,302.10, 25,256.90 and 9,918.60 is: 13,687.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,302.10 : 25,256.90 = 9,918.60 : x
  2. Step 2: Convert to fraction form
    18,302.10/25,256.90 = 9,918.60/x
  3. Step 3: Cross multiply
    18,302.10x = 25,256.90 × 9,918.60
  4. Step 4: Simplify right side
    18,302.10x = 250,513,088.34
  5. Step 5: Solve for x
    x = 250,513,088.34/18,302.10
  6. Step 6: Final answer
    x = 13,687.67

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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.