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Finding the Fourth Proportional to 46,989.64, 70,466.88 and 18,900.20

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Solution

The fourth proportional to 46,989.64, 70,466.88 and 18,900.20 is: 28,343.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    46,989.64 : 70,466.88 = 18,900.20 : x
  2. Step 2: Convert to fraction form
    46,989.64/70,466.88 = 18,900.20/x
  3. Step 3: Cross multiply
    46,989.64x = 70,466.88 × 18,900.20
  4. Step 4: Simplify right side
    46,989.64x = 1,331,837,773.04
  5. Step 5: Solve for x
    x = 1,331,837,773.04/46,989.64
  6. Step 6: Final answer
    x = 28,343.22

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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.