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Finding the Fourth Proportional to 30,649.20, 45,973.80 and 10,928.40

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Solution

The fourth proportional to 30,649.20, 45,973.80 and 10,928.40 is: 16,392.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,649.20 : 45,973.80 = 10,928.40 : x
  2. Step 2: Convert to fraction form
    30,649.20/45,973.80 = 10,928.40/x
  3. Step 3: Cross multiply
    30,649.20x = 45,973.80 × 10,928.40
  4. Step 4: Simplify right side
    30,649.20x = 502,420,075.92
  5. Step 5: Solve for x
    x = 502,420,075.92/30,649.20
  6. Step 6: Final answer
    x = 16,392.60

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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.