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Finding the Fourth Proportional to 34,762.10, 47,978.34 and 20,622.74

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Solution

The fourth proportional to 34,762.10, 47,978.34 and 20,622.74 is: 28,463.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,762.10 : 47,978.34 = 20,622.74 : x
  2. Step 2: Convert to fraction form
    34,762.10/47,978.34 = 20,622.74/x
  3. Step 3: Cross multiply
    34,762.10x = 47,978.34 × 20,622.74
  4. Step 4: Simplify right side
    34,762.10x = 989,444,831.45
  5. Step 5: Solve for x
    x = 989,444,831.45/34,762.10
  6. Step 6: Final answer
    x = 28,463.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.