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Finding the Fourth Proportional to 15,788.90, 21,792.98 and 9,075.22

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Solution

The fourth proportional to 15,788.90, 21,792.98 and 9,075.22 is: 12,526.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.90 : 21,792.98 = 9,075.22 : x
  2. Step 2: Convert to fraction form
    15,788.90/21,792.98 = 9,075.22/x
  3. Step 3: Cross multiply
    15,788.90x = 21,792.98 × 9,075.22
  4. Step 4: Simplify right side
    15,788.90x = 197,776,087.96
  5. Step 5: Solve for x
    x = 197,776,087.96/15,788.90
  6. Step 6: Final answer
    x = 12,526.27

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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.