Home / 28,510.35-39,342.59-15,762.78

Finding the Fourth Proportional to 28,510.35, 39,342.59 and 15,762.78

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Solution

The fourth proportional to 28,510.35, 39,342.59 and 15,762.78 is: 21,751.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,510.35 : 39,342.59 = 15,762.78 : x
  2. Step 2: Convert to fraction form
    28,510.35/39,342.59 = 15,762.78/x
  3. Step 3: Cross multiply
    28,510.35x = 39,342.59 × 15,762.78
  4. Step 4: Simplify right side
    28,510.35x = 620,148,590.80
  5. Step 5: Solve for x
    x = 620,148,590.80/28,510.35
  6. Step 6: Final answer
    x = 21,751.70

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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.