Home / 28,913.60-39,869.16-18,823.40

Finding the Fourth Proportional to 28,913.60, 39,869.16 and 18,823.40

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Solution

The fourth proportional to 28,913.60, 39,869.16 and 18,823.40 is: 25,955.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,913.60 : 39,869.16 = 18,823.40 : x
  2. Step 2: Convert to fraction form
    28,913.60/39,869.16 = 18,823.40/x
  3. Step 3: Cross multiply
    28,913.60x = 39,869.16 × 18,823.40
  4. Step 4: Simplify right side
    28,913.60x = 750,473,146.34
  5. Step 5: Solve for x
    x = 750,473,146.34/28,913.60
  6. Step 6: Final answer
    x = 25,955.71

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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.