Home / 34,688.40-47,870.28-20,356.80

Finding the Fourth Proportional to 34,688.40, 47,870.28 and 20,356.80

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Solution

The fourth proportional to 34,688.40, 47,870.28 and 20,356.80 is: 28,092.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,688.40 : 47,870.28 = 20,356.80 : x
  2. Step 2: Convert to fraction form
    34,688.40/47,870.28 = 20,356.80/x
  3. Step 3: Cross multiply
    34,688.40x = 47,870.28 × 20,356.80
  4. Step 4: Simplify right side
    34,688.40x = 974,485,715.90
  5. Step 5: Solve for x
    x = 974,485,715.90/34,688.40
  6. Step 6: Final answer
    x = 28,092.55

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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.