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Finding the Fourth Proportional to 13,290.48, 18,312.48 and 12,075.48

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Solution

The fourth proportional to 13,290.48, 18,312.48 and 12,075.48 is: 16,638.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.48 : 18,312.48 = 12,075.48 : x
  2. Step 2: Convert to fraction form
    13,290.48/18,312.48 = 12,075.48/x
  3. Step 3: Cross multiply
    13,290.48x = 18,312.48 × 12,075.48
  4. Step 4: Simplify right side
    13,290.48x = 221,131,985.99
  5. Step 5: Solve for x
    x = 221,131,985.99/13,290.48
  6. Step 6: Final answer
    x = 16,638.37

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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.