Home / 28,507-39,339.66-15,931.76

Finding the Fourth Proportional to 28,507, 39,339.66 and 15,931.76

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Solution

The fourth proportional to 28,507, 39,339.66 and 15,931.76 is: 21,985.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,507 : 39,339.66 = 15,931.76 : x
  2. Step 2: Convert to fraction form
    28,507/39,339.66 = 15,931.76/x
  3. Step 3: Cross multiply
    28,507x = 39,339.66 × 15,931.76
  4. Step 4: Simplify right side
    28,507x = 626,750,021.60
  5. Step 5: Solve for x
    x = 626,750,021.60/28,507
  6. Step 6: Final answer
    x = 21,985.83

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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.