Home / 15,430.90-21,294.65-8,357.35

Finding the Fourth Proportional to 15,430.90, 21,294.65 and 8,357.35

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Solution

The fourth proportional to 15,430.90, 21,294.65 and 8,357.35 is: 11,533.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.90 : 21,294.65 = 8,357.35 : x
  2. Step 2: Convert to fraction form
    15,430.90/21,294.65 = 8,357.35/x
  3. Step 3: Cross multiply
    15,430.90x = 21,294.65 × 8,357.35
  4. Step 4: Simplify right side
    15,430.90x = 177,966,843.18
  5. Step 5: Solve for x
    x = 177,966,843.18/15,430.90
  6. Step 6: Final answer
    x = 11,533.15

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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.