Home / 28,430.10-39,233.70-15,683.74

Finding the Fourth Proportional to 28,430.10, 39,233.70 and 15,683.74

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Solution

The fourth proportional to 28,430.10, 39,233.70 and 15,683.74 is: 21,643.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.10 : 39,233.70 = 15,683.74 : x
  2. Step 2: Convert to fraction form
    28,430.10/39,233.70 = 15,683.74/x
  3. Step 3: Cross multiply
    28,430.10x = 39,233.70 × 15,683.74
  4. Step 4: Simplify right side
    28,430.10x = 615,331,150.04
  5. Step 5: Solve for x
    x = 615,331,150.04/28,430.10
  6. Step 6: Final answer
    x = 21,643.65

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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.