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Finding the Fourth Proportional to 28,454.40, 42,681.60 and 12,902.40

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Solution

The fourth proportional to 28,454.40, 42,681.60 and 12,902.40 is: 19,353.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,454.40 : 42,681.60 = 12,902.40 : x
  2. Step 2: Convert to fraction form
    28,454.40/42,681.60 = 12,902.40/x
  3. Step 3: Cross multiply
    28,454.40x = 42,681.60 × 12,902.40
  4. Step 4: Simplify right side
    28,454.40x = 550,695,075.84
  5. Step 5: Solve for x
    x = 550,695,075.84/28,454.40
  6. Step 6: Final answer
    x = 19,353.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.