Home / 28,143-38,837.76-15,567.72

Finding the Fourth Proportional to 28,143, 38,837.76 and 15,567.72

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Solution

The fourth proportional to 28,143, 38,837.76 and 15,567.72 is: 21,483.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143 : 38,837.76 = 15,567.72 : x
  2. Step 2: Convert to fraction form
    28,143/38,837.76 = 15,567.72/x
  3. Step 3: Cross multiply
    28,143x = 38,837.76 × 15,567.72
  4. Step 4: Simplify right side
    28,143x = 604,615,373.11
  5. Step 5: Solve for x
    x = 604,615,373.11/28,143
  6. Step 6: Final answer
    x = 21,483.69

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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.