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Finding the Fourth Proportional to 21,069.27, 29,075.01 and 11,509.41

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Solution

The fourth proportional to 21,069.27, 29,075.01 and 11,509.41 is: 15,882.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,069.27 : 29,075.01 = 11,509.41 : x
  2. Step 2: Convert to fraction form
    21,069.27/29,075.01 = 11,509.41/x
  3. Step 3: Cross multiply
    21,069.27x = 29,075.01 × 11,509.41
  4. Step 4: Simplify right side
    21,069.27x = 334,636,210.84
  5. Step 5: Solve for x
    x = 334,636,210.84/21,069.27
  6. Step 6: Final answer
    x = 15,882.67

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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.