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Finding the Fourth Proportional to 30,459.20, 45,688.80 and 14,907.20

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Solution

The fourth proportional to 30,459.20, 45,688.80 and 14,907.20 is: 22,360.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,459.20 : 45,688.80 = 14,907.20 : x
  2. Step 2: Convert to fraction form
    30,459.20/45,688.80 = 14,907.20/x
  3. Step 3: Cross multiply
    30,459.20x = 45,688.80 × 14,907.20
  4. Step 4: Simplify right side
    30,459.20x = 681,092,079.36
  5. Step 5: Solve for x
    x = 681,092,079.36/30,459.20
  6. Step 6: Final answer
    x = 22,360.80

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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.