Home / 38,428.63-53,031.39-21,432.89

Finding the Fourth Proportional to 38,428.63, 53,031.39 and 21,432.89

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Solution

The fourth proportional to 38,428.63, 53,031.39 and 21,432.89 is: 29,577.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,428.63 : 53,031.39 = 21,432.89 : x
  2. Step 2: Convert to fraction form
    38,428.63/53,031.39 = 21,432.89/x
  3. Step 3: Cross multiply
    38,428.63x = 53,031.39 × 21,432.89
  4. Step 4: Simplify right side
    38,428.63x = 1,136,615,948.42
  5. Step 5: Solve for x
    x = 1,136,615,948.42/38,428.63
  6. Step 6: Final answer
    x = 29,577.32

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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.