Home / 28,004.40-38,646.72-15,430.32

Finding the Fourth Proportional to 28,004.40, 38,646.72 and 15,430.32

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Solution

The fourth proportional to 28,004.40, 38,646.72 and 15,430.32 is: 21,294.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,004.40 : 38,646.72 = 15,430.32 : x
  2. Step 2: Convert to fraction form
    28,004.40/38,646.72 = 15,430.32/x
  3. Step 3: Cross multiply
    28,004.40x = 38,646.72 × 15,430.32
  4. Step 4: Simplify right side
    28,004.40x = 596,331,256.55
  5. Step 5: Solve for x
    x = 596,331,256.55/28,004.40
  6. Step 6: Final answer
    x = 21,294.20

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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.