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Finding the Fourth Proportional to 15,075.18, 20,802.18 and 8,699.62

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Solution

The fourth proportional to 15,075.18, 20,802.18 and 8,699.62 is: 12,004.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,075.18 : 20,802.18 = 8,699.62 : x
  2. Step 2: Convert to fraction form
    15,075.18/20,802.18 = 8,699.62/x
  3. Step 3: Cross multiply
    15,075.18x = 20,802.18 × 8,699.62
  4. Step 4: Simplify right side
    15,075.18x = 180,971,009.17
  5. Step 5: Solve for x
    x = 180,971,009.17/15,075.18
  6. Step 6: Final answer
    x = 12,004.57

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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.