Home / 25,913.60-38,870.40-20,729.60

Finding the Fourth Proportional to 25,913.60, 38,870.40 and 20,729.60

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Solution

The fourth proportional to 25,913.60, 38,870.40 and 20,729.60 is: 31,094.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,913.60 : 38,870.40 = 20,729.60 : x
  2. Step 2: Convert to fraction form
    25,913.60/38,870.40 = 20,729.60/x
  3. Step 3: Cross multiply
    25,913.60x = 38,870.40 × 20,729.60
  4. Step 4: Simplify right side
    25,913.60x = 805,767,843.84
  5. Step 5: Solve for x
    x = 805,767,843.84/25,913.60
  6. Step 6: Final answer
    x = 31,094.40

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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.