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Finding the Fourth Proportional to 28,041.44, 42,068.76 and 8,320.16

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Solution

The fourth proportional to 28,041.44, 42,068.76 and 8,320.16 is: 12,482.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,041.44 : 42,068.76 = 8,320.16 : x
  2. Step 2: Convert to fraction form
    28,041.44/42,068.76 = 8,320.16/x
  3. Step 3: Cross multiply
    28,041.44x = 42,068.76 × 8,320.16
  4. Step 4: Simplify right side
    28,041.44x = 350,018,814.20
  5. Step 5: Solve for x
    x = 350,018,814.20/28,041.44
  6. Step 6: Final answer
    x = 12,482.20

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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.