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Finding the Fourth Proportional to 15,875.40, 21,907.74 and 8,801.40

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Solution

The fourth proportional to 15,875.40, 21,907.74 and 8,801.40 is: 12,145.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,875.40 : 21,907.74 = 8,801.40 : x
  2. Step 2: Convert to fraction form
    15,875.40/21,907.74 = 8,801.40/x
  3. Step 3: Cross multiply
    15,875.40x = 21,907.74 × 8,801.40
  4. Step 4: Simplify right side
    15,875.40x = 192,818,782.84
  5. Step 5: Solve for x
    x = 192,818,782.84/15,875.40
  6. Step 6: Final answer
    x = 12,145.76

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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.