Finding the Fourth Proportional to 28,474,021.52, 39,293,953.74 and 15,420,981.58
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Solution
The fourth proportional to 28,474,021.52, 39,293,953.74 and 15,420,981.58 is: 21,280,848.45
Step by Step Solution
- Step 1: Write the proportion equation
28,474,021.52 : 39,293,953.74 = 15,420,981.58 : x - Step 2: Convert to fraction form
28,474,021.52/39,293,953.74 = 15,420,981.58/x - Step 3: Cross multiply
28,474,021.52x = 39,293,953.74 × 15,420,981.58 - Step 4: Simplify right side
28,474,021.52x = 605,951,336,731,677.25 - Step 5: Solve for x
x = 605,951,336,731,677.25/28,474,021.52 - Step 6: Final answer
x = 21,280,848.45
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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.