Home / 31,703.20-47,554.80-21,258.40

Finding the Fourth Proportional to 31,703.20, 47,554.80 and 21,258.40

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Solution

The fourth proportional to 31,703.20, 47,554.80 and 21,258.40 is: 31,887.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,703.20 : 47,554.80 = 21,258.40 : x
  2. Step 2: Convert to fraction form
    31,703.20/47,554.80 = 21,258.40/x
  3. Step 3: Cross multiply
    31,703.20x = 47,554.80 × 21,258.40
  4. Step 4: Simplify right side
    31,703.20x = 1,010,938,960.32
  5. Step 5: Solve for x
    x = 1,010,938,960.32/31,703.20
  6. Step 6: Final answer
    x = 31,887.60

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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.