Home / 15,503.61-21,387.47-9,211.53

Finding the Fourth Proportional to 15,503.61, 21,387.47 and 9,211.53

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Solution

The fourth proportional to 15,503.61, 21,387.47 and 9,211.53 is: 12,707.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.61 : 21,387.47 = 9,211.53 : x
  2. Step 2: Convert to fraction form
    15,503.61/21,387.47 = 9,211.53/x
  3. Step 3: Cross multiply
    15,503.61x = 21,387.47 × 9,211.53
  4. Step 4: Simplify right side
    15,503.61x = 197,011,275.47
  5. Step 5: Solve for x
    x = 197,011,275.47/15,503.61
  6. Step 6: Final answer
    x = 12,707.45

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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.