Home / 31,148.90-46,675.52-21,140.65

Finding the Fourth Proportional to 31,148.90, 46,675.52 and 21,140.65

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Solution

The fourth proportional to 31,148.90, 46,675.52 and 21,140.65 is: 31,678.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,148.90 : 46,675.52 = 21,140.65 : x
  2. Step 2: Convert to fraction form
    31,148.90/46,675.52 = 21,140.65/x
  3. Step 3: Cross multiply
    31,148.90x = 46,675.52 × 21,140.65
  4. Step 4: Simplify right side
    31,148.90x = 986,750,541.80
  5. Step 5: Solve for x
    x = 986,750,541.80/31,148.90
  6. Step 6: Final answer
    x = 31,678.50

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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.