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Finding the Fourth Proportional to 51,356.60, 70,870.80 and 28,695.72

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Solution

The fourth proportional to 51,356.60, 70,870.80 and 28,695.72 is: 39,599.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,356.60 : 70,870.80 = 28,695.72 : x
  2. Step 2: Convert to fraction form
    51,356.60/70,870.80 = 28,695.72/x
  3. Step 3: Cross multiply
    51,356.60x = 70,870.80 × 28,695.72
  4. Step 4: Simplify right side
    51,356.60x = 2,033,688,632.98
  5. Step 5: Solve for x
    x = 2,033,688,632.98/51,356.60
  6. Step 6: Final answer
    x = 39,599.36

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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.