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Finding the Fourth Proportional to 8,720.51, 13,017.51 and 8,070.03

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Solution

The fourth proportional to 8,720.51, 13,017.51 and 8,070.03 is: 12,046.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.51 : 13,017.51 = 8,070.03 : x
  2. Step 2: Convert to fraction form
    8,720.51/13,017.51 = 8,070.03/x
  3. Step 3: Cross multiply
    8,720.51x = 13,017.51 × 8,070.03
  4. Step 4: Simplify right side
    8,720.51x = 105,051,696.23
  5. Step 5: Solve for x
    x = 105,051,696.23/8,720.51
  6. Step 6: Final answer
    x = 12,046.51

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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.