Home / 38,428.18-53,030.78-21,432.45

Finding the Fourth Proportional to 38,428.18, 53,030.78 and 21,432.45

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Solution

The fourth proportional to 38,428.18, 53,030.78 and 21,432.45 is: 29,576.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,428.18 : 53,030.78 = 21,432.45 : x
  2. Step 2: Convert to fraction form
    38,428.18/53,030.78 = 21,432.45/x
  3. Step 3: Cross multiply
    38,428.18x = 53,030.78 × 21,432.45
  4. Step 4: Simplify right side
    38,428.18x = 1,136,579,540.81
  5. Step 5: Solve for x
    x = 1,136,579,540.81/38,428.18
  6. Step 6: Final answer
    x = 29,576.72

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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.